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MIT License
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Copyright (c) 2020 Arlo Carreon, http://arlocarreon.com
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.
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<?php
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/**
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* Author: Arlo Carreon <http://arlocarreon.com>
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* Info: http://mexitek.github.io/phpColors/
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* License: http://arlo.mit-license.org/
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*/
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namespace Mexitek\PHPColors;
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use Exception;
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/**
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* A color utility that helps manipulate HEX colors
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*/
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class Color
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{
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/**
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* @var string
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*/
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private $_hex;
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/**
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* @var array
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*/
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private $_hsl;
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/**
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* @var array
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*/
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private $_rgb;
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/**
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* Auto darkens/lightens by 10% for sexily-subtle gradients.
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* Set this to FALSE to adjust automatic shade to be between given color
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* and black (for darken) or white (for lighten)
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*/
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public const DEFAULT_ADJUST = 10;
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/**
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* Instantiates the class with a HEX value
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* @param string $hex
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* @throws Exception
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*/
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public function __construct(string $hex)
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{
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$color = self::sanitizeHex($hex);
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$this->_hex = $color;
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$this->_hsl = self::hexToHsl($color);
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$this->_rgb = self::hexToRgb($color);
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}
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/**
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* Given a HEX string returns a HSL array equivalent.
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* @param string $color
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* @return array HSL associative array
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* @throws Exception
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*/
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public static function hexToHsl(string $color): array
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{
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// Sanity check
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$color = self::sanitizeHex($color);
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// Convert HEX to DEC
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$R = hexdec($color[0] . $color[1]);
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$G = hexdec($color[2] . $color[3]);
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$B = hexdec($color[4] . $color[5]);
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$HSL = array();
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$var_R = ($R / 255);
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$var_G = ($G / 255);
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$var_B = ($B / 255);
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$var_Min = min($var_R, $var_G, $var_B);
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$var_Max = max($var_R, $var_G, $var_B);
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$del_Max = $var_Max - $var_Min;
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$L = ($var_Max + $var_Min) / 2;
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if ($del_Max == 0) {
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$H = 0;
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$S = 0;
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} else {
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if ($L < 0.5) {
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$S = $del_Max / ($var_Max + $var_Min);
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} else {
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$S = $del_Max / (2 - $var_Max - $var_Min);
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}
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$del_R = ((($var_Max - $var_R) / 6) + ($del_Max / 2)) / $del_Max;
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$del_G = ((($var_Max - $var_G) / 6) + ($del_Max / 2)) / $del_Max;
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$del_B = ((($var_Max - $var_B) / 6) + ($del_Max / 2)) / $del_Max;
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if ($var_R == $var_Max) {
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$H = $del_B - $del_G;
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} elseif ($var_G == $var_Max) {
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$H = (1 / 3) + $del_R - $del_B;
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} elseif ($var_B == $var_Max) {
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$H = (2 / 3) + $del_G - $del_R;
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}
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if ($H < 0) {
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$H++;
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}
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if ($H > 1) {
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$H--;
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}
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}
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$HSL['H'] = ($H * 360);
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$HSL['S'] = $S;
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$HSL['L'] = $L;
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return $HSL;
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}
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/**
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* Given a HSL associative array returns the equivalent HEX string
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* @param array $hsl
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* @return string HEX string
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* @throws Exception "Bad HSL Array"
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*/
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public static function hslToHex(array $hsl = array()): string
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{
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// Make sure it's HSL
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if (empty($hsl) || !isset($hsl["H"], $hsl["S"], $hsl["L"])) {
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throw new Exception("Param was not an HSL array");
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}
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list($H, $S, $L) = array($hsl['H'] / 360, $hsl['S'], $hsl['L']);
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if ($S == 0) {
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$r = $L * 255;
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$g = $L * 255;
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$b = $L * 255;
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} else {
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if ($L < 0.5) {
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$var_2 = $L * (1 + $S);
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} else {
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$var_2 = ($L + $S) - ($S * $L);
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}
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$var_1 = 2 * $L - $var_2;
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$r = 255 * self::hueToRgb($var_1, $var_2, $H + (1 / 3));
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$g = 255 * self::hueToRgb($var_1, $var_2, $H);
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$b = 255 * self::hueToRgb($var_1, $var_2, $H - (1 / 3));
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}
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// Convert to hex
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$r = dechex(round($r));
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$g = dechex(round($g));
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$b = dechex(round($b));
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// Make sure we get 2 digits for decimals
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$r = (strlen("" . $r) === 1) ? "0" . $r : $r;
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$g = (strlen("" . $g) === 1) ? "0" . $g : $g;
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$b = (strlen("" . $b) === 1) ? "0" . $b : $b;
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return $r . $g . $b;
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}
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/**
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* Given a HEX string returns a RGB array equivalent.
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* @param string $color
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* @return array RGB associative array
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* @throws Exception
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*/
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public static function hexToRgb(string $color): array
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{
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// Sanity check
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$color = self::sanitizeHex($color);
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// Convert HEX to DEC
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$R = hexdec($color[0] . $color[1]);
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$G = hexdec($color[2] . $color[3]);
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$B = hexdec($color[4] . $color[5]);
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$RGB['R'] = $R;
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$RGB['G'] = $G;
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$RGB['B'] = $B;
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return $RGB;
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}
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/**
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* Given an RGB associative array returns the equivalent HEX string
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* @param array $rgb
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* @return string Hex string
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* @throws Exception "Bad RGB Array"
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*/
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public static function rgbToHex(array $rgb = array()): string
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{
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// Make sure it's RGB
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if (empty($rgb) || !isset($rgb["R"], $rgb["G"], $rgb["B"])) {
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throw new Exception("Param was not an RGB array");
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}
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// https://github.com/mexitek/phpColors/issues/25#issuecomment-88354815
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// Convert RGB to HEX
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$hex[0] = str_pad(dechex((int)$rgb['R']), 2, '0', STR_PAD_LEFT);
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$hex[1] = str_pad(dechex((int)$rgb['G']), 2, '0', STR_PAD_LEFT);
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$hex[2] = str_pad(dechex((int)$rgb['B']), 2, '0', STR_PAD_LEFT);
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// Make sure that 2 digits are allocated to each color.
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$hex[0] = (strlen($hex[0]) === 1) ? '0' . $hex[0] : $hex[0];
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$hex[1] = (strlen($hex[1]) === 1) ? '0' . $hex[1] : $hex[1];
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$hex[2] = (strlen($hex[2]) === 1) ? '0' . $hex[2] : $hex[2];
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return implode('', $hex);
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}
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/**
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* Given an RGB associative array, returns CSS string output.
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* @param array $rgb
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* @return string rgb(r,g,b) string
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* @throws Exception "Bad RGB Array"
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*/
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public static function rgbToString(array $rgb = array()): string
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{
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// Make sure it's RGB
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if (empty($rgb) || !isset($rgb["R"], $rgb["G"], $rgb["B"])) {
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throw new Exception("Param was not an RGB array");
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}
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return 'rgb(' .
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$rgb['R'] . ', ' .
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$rgb['G'] . ', ' .
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$rgb['B'] . ')';
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}
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/**
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* Given a standard color name, return hex code
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*
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* @param string $color_name
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* @return string
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*/
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public static function nameToHex(string $color_name): string
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{
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$colors = array(
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'aliceblue' => 'F0F8FF',
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'antiquewhite' => 'FAEBD7',
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'aqua' => '00FFFF',
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'aquamarine' => '7FFFD4',
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'azure' => 'F0FFFF',
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'beige' => 'F5F5DC',
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'bisque' => 'FFE4C4',
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'black' => '000000',
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'blanchedalmond' => 'FFEBCD',
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'blue' => '0000FF',
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'blueviolet' => '8A2BE2',
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'brown' => 'A52A2A',
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'burlywood' => 'DEB887',
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'cadetblue' => '5F9EA0',
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'chartreuse' => '7FFF00',
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'chocolate' => 'D2691E',
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'coral' => 'FF7F50',
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'cornflowerblue' => '6495ED',
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'cornsilk' => 'FFF8DC',
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'crimson' => 'DC143C',
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'cyan' => '00FFFF',
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'darkblue' => '00008B',
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'darkcyan' => '008B8B',
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'darkgoldenrod' => 'B8860B',
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'darkgray' => 'A9A9A9',
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'darkgreen' => '006400',
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'darkgrey' => 'A9A9A9',
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'darkkhaki' => 'BDB76B',
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'darkmagenta' => '8B008B',
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'darkolivegreen' => '556B2F',
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'darkorange' => 'FF8C00',
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'darkorchid' => '9932CC',
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'darkred' => '8B0000',
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'darksalmon' => 'E9967A',
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'darkseagreen' => '8FBC8F',
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'darkslateblue' => '483D8B',
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'darkslategray' => '2F4F4F',
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'darkslategrey' => '2F4F4F',
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'darkturquoise' => '00CED1',
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'darkviolet' => '9400D3',
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'deeppink' => 'FF1493',
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'deepskyblue' => '00BFFF',
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'dimgray' => '696969',
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'dimgrey' => '696969',
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'dodgerblue' => '1E90FF',
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'firebrick' => 'B22222',
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'floralwhite' => 'FFFAF0',
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'forestgreen' => '228B22',
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'fuchsia' => 'FF00FF',
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'gainsboro' => 'DCDCDC',
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'ghostwhite' => 'F8F8FF',
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'gold' => 'FFD700',
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'goldenrod' => 'DAA520',
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'gray' => '808080',
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'green' => '008000',
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'greenyellow' => 'ADFF2F',
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'grey' => '808080',
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'honeydew' => 'F0FFF0',
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'hotpink' => 'FF69B4',
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'indianred' => 'CD5C5C',
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'indigo' => '4B0082',
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'ivory' => 'FFFFF0',
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'khaki' => 'F0E68C',
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'lavender' => 'E6E6FA',
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'lavenderblush' => 'FFF0F5',
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'lawngreen' => '7CFC00',
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'lemonchiffon' => 'FFFACD',
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'lightblue' => 'ADD8E6',
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'lightcoral' => 'F08080',
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'lightcyan' => 'E0FFFF',
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'lightgoldenrodyellow' => 'FAFAD2',
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'lightgray' => 'D3D3D3',
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'lightgreen' => '90EE90',
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'lightgrey' => 'D3D3D3',
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'lightpink' => 'FFB6C1',
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'lightsalmon' => 'FFA07A',
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'lightseagreen' => '20B2AA',
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'lightskyblue' => '87CEFA',
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'lightslategray' => '778899',
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'lightslategrey' => '778899',
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'lightsteelblue' => 'B0C4DE',
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'lightyellow' => 'FFFFE0',
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'lime' => '00FF00',
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'limegreen' => '32CD32',
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'linen' => 'FAF0E6',
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'magenta' => 'FF00FF',
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'maroon' => '800000',
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'mediumaquamarine' => '66CDAA',
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'mediumblue' => '0000CD',
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'mediumorchid' => 'BA55D3',
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'mediumpurple' => '9370D0',
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'mediumseagreen' => '3CB371',
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'mediumslateblue' => '7B68EE',
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'mediumspringgreen' => '00FA9A',
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'mediumturquoise' => '48D1CC',
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'mediumvioletred' => 'C71585',
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'midnightblue' => '191970',
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'mintcream' => 'F5FFFA',
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'mistyrose' => 'FFE4E1',
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'moccasin' => 'FFE4B5',
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'navajowhite' => 'FFDEAD',
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'navy' => '000080',
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'oldlace' => 'FDF5E6',
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'olive' => '808000',
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'olivedrab' => '6B8E23',
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'orange' => 'FFA500',
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'orangered' => 'FF4500',
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'orchid' => 'DA70D6',
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'palegoldenrod' => 'EEE8AA',
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'palegreen' => '98FB98',
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'paleturquoise' => 'AFEEEE',
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'palevioletred' => 'DB7093',
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'papayawhip' => 'FFEFD5',
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'peachpuff' => 'FFDAB9',
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'peru' => 'CD853F',
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'pink' => 'FFC0CB',
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'plum' => 'DDA0DD',
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'powderblue' => 'B0E0E6',
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'purple' => '800080',
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'red' => 'FF0000',
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'rosybrown' => 'BC8F8F',
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'royalblue' => '4169E1',
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'saddlebrown' => '8B4513',
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'salmon' => 'FA8072',
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'sandybrown' => 'F4A460',
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'seagreen' => '2E8B57',
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'seashell' => 'FFF5EE',
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'sienna' => 'A0522D',
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'silver' => 'C0C0C0',
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'skyblue' => '87CEEB',
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'slateblue' => '6A5ACD',
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'slategray' => '708090',
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'slategrey' => '708090',
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'snow' => 'FFFAFA',
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'springgreen' => '00FF7F',
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'steelblue' => '4682B4',
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'tan' => 'D2B48C',
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'teal' => '008080',
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'thistle' => 'D8BFD8',
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'tomato' => 'FF6347',
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'turquoise' => '40E0D0',
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'violet' => 'EE82EE',
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'wheat' => 'F5DEB3',
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'white' => 'FFFFFF',
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'whitesmoke' => 'F5F5F5',
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'yellow' => 'FFFF00',
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'yellowgreen' => '9ACD32'
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);
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||||
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$color_name = strtolower($color_name);
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||||
if (isset($colors[$color_name])) {
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return '#' . $colors[$color_name];
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||||
}
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||||
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||||
return $color_name;
|
||||
}
|
||||
|
||||
/**
|
||||
* Given a HEX value, returns a darker color. If no desired amount provided, then the color halfway between
|
||||
* given HEX and black will be returned.
|
||||
* @param int $amount
|
||||
* @return string Darker HEX value
|
||||
* @throws Exception
|
||||
*/
|
||||
public function darken(int $amount = self::DEFAULT_ADJUST): string
|
||||
{
|
||||
// Darken
|
||||
$darkerHSL = $this->darkenHsl($this->_hsl, $amount);
|
||||
// Return as HEX
|
||||
return self::hslToHex($darkerHSL);
|
||||
}
|
||||
|
||||
/**
|
||||
* Given a HEX value, returns a lighter color. If no desired amount provided, then the color halfway between
|
||||
* given HEX and white will be returned.
|
||||
* @param int $amount
|
||||
* @return string Lighter HEX value
|
||||
* @throws Exception
|
||||
*/
|
||||
public function lighten(int $amount = self::DEFAULT_ADJUST): string
|
||||
{
|
||||
// Lighten
|
||||
$lighterHSL = $this->lightenHsl($this->_hsl, $amount);
|
||||
// Return as HEX
|
||||
return self::hslToHex($lighterHSL);
|
||||
}
|
||||
|
||||
/**
|
||||
* Given a HEX value, returns a mixed color. If no desired amount provided, then the color mixed by this ratio
|
||||
* @param string $hex2 Secondary HEX value to mix with
|
||||
* @param int $amount = -100..0..+100
|
||||
* @return string mixed HEX value
|
||||
* @throws Exception
|
||||
*/
|
||||
public function mix(string $hex2, int $amount = 0): string
|
||||
{
|
||||
$rgb2 = self::hexToRgb($hex2);
|
||||
$mixed = $this->mixRgb($this->_rgb, $rgb2, $amount);
|
||||
// Return as HEX
|
||||
return self::rgbToHex($mixed);
|
||||
}
|
||||
|
||||
/**
|
||||
* Creates an array with two shades that can be used to make a gradient
|
||||
* @param int $amount Optional percentage amount you want your contrast color
|
||||
* @return array An array with a 'light' and 'dark' index
|
||||
* @throws Exception
|
||||
*/
|
||||
public function makeGradient(int $amount = self::DEFAULT_ADJUST): array
|
||||
{
|
||||
// Decide which color needs to be made
|
||||
if ($this->isLight()) {
|
||||
$lightColor = $this->_hex;
|
||||
$darkColor = $this->darken($amount);
|
||||
} else {
|
||||
$lightColor = $this->lighten($amount);
|
||||
$darkColor = $this->_hex;
|
||||
}
|
||||
|
||||
// Return our gradient array
|
||||
return array("light" => $lightColor, "dark" => $darkColor);
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* Returns whether or not given color is considered "light"
|
||||
* @param string|bool $color
|
||||
* @param int $lighterThan
|
||||
* @return boolean
|
||||
*/
|
||||
public function isLight($color = false, int $lighterThan = 130): bool
|
||||
{
|
||||
// Get our color
|
||||
$color = ($color) ? $color : $this->_hex;
|
||||
|
||||
// Calculate straight from rbg
|
||||
$r = hexdec($color[0] . $color[1]);
|
||||
$g = hexdec($color[2] . $color[3]);
|
||||
$b = hexdec($color[4] . $color[5]);
|
||||
|
||||
return (($r * 299 + $g * 587 + $b * 114) / 1000 > $lighterThan);
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns whether or not a given color is considered "dark"
|
||||
* @param string|bool $color
|
||||
* @param int $darkerThan
|
||||
* @return boolean
|
||||
*/
|
||||
public function isDark($color = false, int $darkerThan = 130): bool
|
||||
{
|
||||
// Get our color
|
||||
$color = ($color) ? $color : $this->_hex;
|
||||
|
||||
// Calculate straight from rbg
|
||||
$r = hexdec($color[0] . $color[1]);
|
||||
$g = hexdec($color[2] . $color[3]);
|
||||
$b = hexdec($color[4] . $color[5]);
|
||||
|
||||
return (($r * 299 + $g * 587 + $b * 114) / 1000 <= $darkerThan);
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the complimentary color
|
||||
* @return string Complementary hex color
|
||||
* @throws Exception
|
||||
*/
|
||||
public function complementary(): string
|
||||
{
|
||||
// Get our HSL
|
||||
$hsl = $this->_hsl;
|
||||
|
||||
// Adjust Hue 180 degrees
|
||||
$hsl['H'] += ($hsl['H'] > 180) ? -180 : 180;
|
||||
|
||||
// Return the new value in HEX
|
||||
return self::hslToHex($hsl);
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the HSL array of your color
|
||||
*/
|
||||
public function getHsl(): array
|
||||
{
|
||||
return $this->_hsl;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns your original color
|
||||
*/
|
||||
public function getHex(): string
|
||||
{
|
||||
return $this->_hex;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the RGB array of your color
|
||||
*/
|
||||
public function getRgb(): array
|
||||
{
|
||||
return $this->_rgb;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the cross browser CSS3 gradient
|
||||
* @param int $amount Optional: percentage amount to light/darken the gradient
|
||||
* @param boolean $vintageBrowsers Optional: include vendor prefixes for browsers that almost died out already
|
||||
* @param string $prefix Optional: prefix for every lines
|
||||
* @param string $suffix Optional: suffix for every lines
|
||||
* @return string CSS3 gradient for chrome, safari, firefox, opera and IE10
|
||||
* @throws Exception
|
||||
* @link http://caniuse.com/css-gradients Resource for the browser support
|
||||
*/
|
||||
public function getCssGradient($amount = self::DEFAULT_ADJUST, $vintageBrowsers = false, $suffix = "", $prefix = ""): string
|
||||
{
|
||||
// Get the recommended gradient
|
||||
$g = $this->makeGradient($amount);
|
||||
|
||||
$css = "";
|
||||
/* fallback/image non-cover color */
|
||||
$css .= "{$prefix}background-color: #" . $this->_hex . ";{$suffix}";
|
||||
|
||||
/* IE Browsers */
|
||||
$css .= "{$prefix}filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#" . $g['light'] . "', endColorstr='#" . $g['dark'] . "');{$suffix}";
|
||||
|
||||
/* Safari 4+, Chrome 1-9 */
|
||||
if ($vintageBrowsers) {
|
||||
$css .= "{$prefix}background-image: -webkit-gradient(linear, 0% 0%, 0% 100%, from(#" . $g['light'] . "), to(#" . $g['dark'] . "));{$suffix}";
|
||||
}
|
||||
|
||||
/* Safari 5.1+, Mobile Safari, Chrome 10+ */
|
||||
$css .= "{$prefix}background-image: -webkit-linear-gradient(top, #" . $g['light'] . ", #" . $g['dark'] . ");{$suffix}";
|
||||
|
||||
if ($vintageBrowsers) {
|
||||
/* Firefox 3.6+ */
|
||||
$css .= "{$prefix}background-image: -moz-linear-gradient(top, #" . $g['light'] . ", #" . $g['dark'] . ");{$suffix}";
|
||||
|
||||
/* Opera 11.10+ */
|
||||
$css .= "{$prefix}background-image: -o-linear-gradient(top, #" . $g['light'] . ", #" . $g['dark'] . ");{$suffix}";
|
||||
}
|
||||
|
||||
/* Unprefixed version (standards): FF 16+, IE10+, Chrome 26+, Safari 7+, Opera 12.1+ */
|
||||
$css .= "{$prefix}background-image: linear-gradient(to bottom, #" . $g['light'] . ", #" . $g['dark'] . ");{$suffix}";
|
||||
|
||||
// Return our CSS
|
||||
return $css;
|
||||
}
|
||||
|
||||
/**
|
||||
* Darkens a given HSL array
|
||||
* @param array $hsl
|
||||
* @param int $amount
|
||||
* @return array $hsl
|
||||
*/
|
||||
private function darkenHsl(array $hsl, int $amount = self::DEFAULT_ADJUST): array
|
||||
{
|
||||
// Check if we were provided a number
|
||||
if ($amount) {
|
||||
$hsl['L'] = ($hsl['L'] * 100) - $amount;
|
||||
$hsl['L'] = ($hsl['L'] < 0) ? 0 : $hsl['L'] / 100;
|
||||
} else {
|
||||
// We need to find out how much to darken
|
||||
$hsl['L'] /= 2;
|
||||
}
|
||||
|
||||
return $hsl;
|
||||
}
|
||||
|
||||
/**
|
||||
* Lightens a given HSL array
|
||||
* @param array $hsl
|
||||
* @param int $amount
|
||||
* @return array
|
||||
*/
|
||||
private function lightenHsl(array $hsl, int $amount = self::DEFAULT_ADJUST): array
|
||||
{
|
||||
// Check if we were provided a number
|
||||
if ($amount) {
|
||||
$hsl['L'] = ($hsl['L'] * 100) + $amount;
|
||||
$hsl['L'] = ($hsl['L'] > 100) ? 1 : $hsl['L'] / 100;
|
||||
} else {
|
||||
// We need to find out how much to lighten
|
||||
$hsl['L'] += (1 - $hsl['L']) / 2;
|
||||
}
|
||||
|
||||
return $hsl;
|
||||
}
|
||||
|
||||
/**
|
||||
* Mix two RGB colors and return the resulting RGB color
|
||||
* ported from http://phpxref.pagelines.com/nav.html?includes/class.colors.php.source.html
|
||||
* @param array $rgb1
|
||||
* @param array $rgb2
|
||||
* @param int $amount ranged -100..0..+100
|
||||
* @return array
|
||||
*/
|
||||
private function mixRgb(array $rgb1, array $rgb2, int $amount = 0): array
|
||||
{
|
||||
$r1 = ($amount + 100) / 100;
|
||||
$r2 = 2 - $r1;
|
||||
|
||||
$rmix = (($rgb1['R'] * $r1) + ($rgb2['R'] * $r2)) / 2;
|
||||
$gmix = (($rgb1['G'] * $r1) + ($rgb2['G'] * $r2)) / 2;
|
||||
$bmix = (($rgb1['B'] * $r1) + ($rgb2['B'] * $r2)) / 2;
|
||||
|
||||
return array('R' => $rmix, 'G' => $gmix, 'B' => $bmix);
|
||||
}
|
||||
|
||||
/**
|
||||
* Given a Hue, returns corresponding RGB value
|
||||
* @param float $v1
|
||||
* @param float $v2
|
||||
* @param float $vH
|
||||
* @return float
|
||||
*/
|
||||
private static function hueToRgb(float $v1, float $v2, float $vH): float
|
||||
{
|
||||
if ($vH < 0) {
|
||||
++$vH;
|
||||
}
|
||||
|
||||
if ($vH > 1) {
|
||||
--$vH;
|
||||
}
|
||||
|
||||
if ((6 * $vH) < 1) {
|
||||
return ($v1 + ($v2 - $v1) * 6 * $vH);
|
||||
}
|
||||
|
||||
if ((2 * $vH) < 1) {
|
||||
return $v2;
|
||||
}
|
||||
|
||||
if ((3 * $vH) < 2) {
|
||||
return ($v1 + ($v2 - $v1) * ((2 / 3) - $vH) * 6);
|
||||
}
|
||||
|
||||
return $v1;
|
||||
}
|
||||
|
||||
/**
|
||||
* Checks the HEX string for correct formatting and converts short format to long
|
||||
* @param string $hex
|
||||
* @return string
|
||||
* @throws Exception
|
||||
*/
|
||||
private static function sanitizeHex(string $hex): string
|
||||
{
|
||||
// Strip # sign if it is present
|
||||
$color = str_replace("#", "", $hex);
|
||||
|
||||
// Validate hex string
|
||||
if (!preg_match('/^[a-fA-F0-9]+$/', $color)) {
|
||||
throw new Exception("HEX color does not match format");
|
||||
}
|
||||
|
||||
// Make sure it's 6 digits
|
||||
if (strlen($color) === 3) {
|
||||
$color = $color[0] . $color[0] . $color[1] . $color[1] . $color[2] . $color[2];
|
||||
} elseif (strlen($color) !== 6) {
|
||||
throw new Exception("HEX color needs to be 6 or 3 digits long");
|
||||
}
|
||||
|
||||
return $color;
|
||||
}
|
||||
|
||||
/**
|
||||
* Converts object into its string representation
|
||||
* @return string
|
||||
*/
|
||||
public function __toString()
|
||||
{
|
||||
return "#" . $this->getHex();
|
||||
}
|
||||
|
||||
/**
|
||||
* @param string $name
|
||||
* @return mixed|null
|
||||
*/
|
||||
public function __get(string $name)
|
||||
{
|
||||
switch (strtolower($name)) {
|
||||
case 'red':
|
||||
case 'r':
|
||||
return $this->_rgb["R"];
|
||||
case 'green':
|
||||
case 'g':
|
||||
return $this->_rgb["G"];
|
||||
case 'blue':
|
||||
case 'b':
|
||||
return $this->_rgb["B"];
|
||||
case 'hue':
|
||||
case 'h':
|
||||
return $this->_hsl["H"];
|
||||
case 'saturation':
|
||||
case 's':
|
||||
return $this->_hsl["S"];
|
||||
case 'lightness':
|
||||
case 'l':
|
||||
return $this->_hsl["L"];
|
||||
}
|
||||
|
||||
$trace = debug_backtrace();
|
||||
trigger_error(
|
||||
'Undefined property via __get(): ' . $name . ' in ' . $trace[0]['file'] . ' on line ' . $trace[0]['line'],
|
||||
E_USER_NOTICE
|
||||
);
|
||||
return null;
|
||||
}
|
||||
|
||||
/**
|
||||
* @param string $name
|
||||
* @param mixed $value
|
||||
* @throws Exception
|
||||
*/
|
||||
public function __set(string $name, $value)
|
||||
{
|
||||
switch (strtolower($name)) {
|
||||
case 'red':
|
||||
case 'r':
|
||||
$this->_rgb["R"] = $value;
|
||||
$this->_hex = self::rgbToHex($this->_rgb);
|
||||
$this->_hsl = self::hexToHsl($this->_hex);
|
||||
break;
|
||||
case 'green':
|
||||
case 'g':
|
||||
$this->_rgb["G"] = $value;
|
||||
$this->_hex = self::rgbToHex($this->_rgb);
|
||||
$this->_hsl = self::hexToHsl($this->_hex);
|
||||
break;
|
||||
case 'blue':
|
||||
case 'b':
|
||||
$this->_rgb["B"] = $value;
|
||||
$this->_hex = self::rgbToHex($this->_rgb);
|
||||
$this->_hsl = self::hexToHsl($this->_hex);
|
||||
break;
|
||||
case 'hue':
|
||||
case 'h':
|
||||
$this->_hsl["H"] = $value;
|
||||
$this->_hex = self::hslToHex($this->_hsl);
|
||||
$this->_rgb = self::hexToRgb($this->_hex);
|
||||
break;
|
||||
case 'saturation':
|
||||
case 's':
|
||||
$this->_hsl["S"] = $value;
|
||||
$this->_hex = self::hslToHex($this->_hsl);
|
||||
$this->_rgb = self::hexToRgb($this->_hex);
|
||||
break;
|
||||
case 'lightness':
|
||||
case 'light':
|
||||
case 'l':
|
||||
$this->_hsl["L"] = $value;
|
||||
$this->_hex = self::hslToHex($this->_hsl);
|
||||
$this->_rgb = self::hexToRgb($this->_hex);
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user