How to convert a string color to its hex code or RGB value?
I am not sure if its possible but I would like to create some sort of function where you pass in a string such as "yellow" or "green" and it returns its hex code or the range of hex codes that greens or yellows fit into.
Is this possible in PHP? I开发者_C百科f not possible, I am willing to try anything else that can do this!
Thanks all
// converts an html color name to a hex color value // if the input is not a color name, the original value is returned // http://wpCodeSnippets.info function color_name_to_hex($color_name) { // standard 147 HTML color names $colors = array( 'aliceblue'=>'F0F8FF', 'antiquewhite'=>'FAEBD7', 'aqua'=>'00FFFF', 'aquamarine'=>'7FFFD4', 'azure'=>'F0FFFF', 'beige'=>'F5F5DC', 'bisque'=>'FFE4C4', 'black'=>'000000', 'blanchedalmond '=>'FFEBCD', 'blue'=>'0000FF', 'blueviolet'=>'8A2BE2', 'brown'=>'A52A2A', 'burlywood'=>'DEB887', 'cadetblue'=>'5F9EA0', 'chartreuse'=>'7FFF00', 'chocolate'=>'D2691E', 'coral'=>'FF7F50', 'cornflowerblue'=>'6495ED', 'cornsilk'=>'FFF8DC', 'crimson'=>'DC143C', 'cyan'=>'00FFFF', 'darkblue'=>'00008B', 'darkcyan'=>'008B8B', 'darkgoldenrod'=>'B8860B', 'darkgray'=>'A9A9A9', 'darkgreen'=>'006400', 'darkgrey'=>'A9A9A9', 'darkkhaki'=>'BDB76B', 'darkmagenta'=>'8B008B', 'darkolivegreen'=>'556B2F', 'darkorange'=>'FF8C00', 'darkorchid'=>'9932CC', 'darkred'=>'8B0000', 'darksalmon'=>'E9967A', 'darkseagreen'=>'8FBC8F', 'darkslateblue'=>'483D8B', 'darkslategray'=>'2F4F4F', 'darkslategrey'=>'2F4F4F', 'darkturquoise'=>'00CED1', 'darkviolet'=>'9400D3', 'deeppink'=>'FF1493', 'deepskyblue'=>'00BFFF', 'dimgray'=>'696969', 'dimgrey'=>'696969', 'dodgerblue'=>'1E90FF', 'firebrick'=>'B22222', 'floralwhite'=>'FFFAF0', 'forestgreen'=>'228B22', 'fuchsia'=>'FF00FF', 'gainsboro'=>'DCDCDC', 'ghostwhite'=>'F8F8FF', 'gold'=>'FFD700', 'goldenrod'=>'DAA520', 'gray'=>'808080', 'green'=>'008000', 'greenyellow'=>'ADFF2F', 'grey'=>'808080', 'honeydew'=>'F0FFF0', 'hotpink'=>'FF69B4', 'indianred'=>'CD5C5C', 'indigo'=>'4B0082', 'ivory'=>'FFFFF0', 'khaki'=>'F0E68C', 'lavender'=>'E6E6FA', 'lavenderblush'=>'FFF0F5', 'lawngreen'=>'7CFC00', 'lemonchiffon'=>'FFFACD', 'lightblue'=>'ADD8E6', 'lightcoral'=>'F08080', 'lightcyan'=>'E0FFFF', 'lightgoldenrodyellow'=>'FAFAD2', 'lightgray'=>'D3D3D3', 'lightgreen'=>'90EE90', 'lightgrey'=>'D3D3D3', 'lightpink'=>'FFB6C1', 'lightsalmon'=>'FFA07A', 'lightseagreen'=>'20B2AA', 'lightskyblue'=>'87CEFA', 'lightslategray'=>'778899', 'lightslategrey'=>'778899', 'lightsteelblue'=>'B0C4DE', 'lightyellow'=>'FFFFE0', 'lime'=>'00FF00', 'limegreen'=>'32CD32', 'linen'=>'FAF0E6', 'magenta'=>'FF00FF', 'maroon'=>'800000', 'mediumaquamarine'=>'66CDAA', 'mediumblue'=>'0000CD', 'mediumorchid'=>'BA55D3', 'mediumpurple'=>'9370D0', 'mediumseagreen'=>'3CB371', 'mediumslateblue'=>'7B68EE', 'mediumspringgreen'=>'00FA9A', 'mediumturquoise'=>'48D1CC', 'mediumvioletred'=>'C71585', 'midnightblue'=>'191970', 'mintcream'=>'F5FFFA', 'mistyrose'=>'FFE4E1', 'moccasin'=>'FFE4B5', 'navajowhite'=>'FFDEAD', 'navy'=>'000080', 'oldlace'=>'FDF5E6', 'olive'=>'808000', 'olivedrab'=>'6B8E23', 'orange'=>'FFA500', 'orangered'=>'FF4500', 'orchid'=>'DA70D6', 'palegoldenrod'=>'EEE8AA', 'palegreen'=>'98FB98', 'paleturquoise'=>'AFEEEE', 'palevioletred'=>'DB7093', 'papayawhip'=>'FFEFD5', 'peachpuff'=>'FFDAB9', 'peru'=>'CD853F', 'pink'=>'FFC0CB', 'plum'=>'DDA0DD', 'powderblue'=>'B0E0E6', 'purple'=>'800080', 'red'=>'FF0000', 'rosybrown'=>'BC8F8F', 'royalblue'=>'4169E1', 'saddlebrown'=>'8B4513', 'salmon'=>'FA8072', 'sandybrown'=>'F4A460', 'seagreen'=>'2E8B57', 'seashell'=>'FFF5EE', 'sienna'=>'A0522D', 'silver'=>'C0C0C0', 'skyblue'=>'87CEEB', 'slateblue'=>'6A5ACD', 'slategray'=>'708090', 'slategrey'=>'708090', 'snow'=>'FFFAFA', 'springgreen'=>'00FF7F', 'steelblue'=>'4682B4', 'tan'=>'D2B48C', 'teal'=>'008080', 'thistle'=>'D8BFD8', 'tomato'=>'FF6347', 'turquoise'=>'40E0D0', 'violet'=>'EE82EE', 'wheat'=>'F5DEB3', 'white'=>'FFFFFF', 'whitesmoke'=>'F5F5F5', 'yellow'=>'FFFF00', 'yellowgreen'=>'9ACD32'); $color_name = strtolower($color_name); if (isset($colors[$color_name])) { return ('#' . $colors[$color_name]); } else { return ($color_name); } }
There is no way to my knowledge to convert HTML color names or CSS color names to their Hex or RGB value in PHP. You'd have to create a map that knows the names (see Wiki article).
Someone has done this work for you already:
- http://psoug.org/snippet/CSS_Colornames_to_RGB_values_415.htm
Excerpt:
$Colors = ARRAY(
"black"=>array( "red"=>0x00, "green"=>0x00, "blue"=>0x00),
"maroon"=>array( "red"=>0x80, "green"=>0x00, "blue"=>0x00),
// ...
// more colors inbetween
// ...
"wheat"=>array( "red"=>0xF5, "green"=>0xDE, "blue"=>0xB3),
"whitesmoke"=>array( "red"=>0xF5, "green"=>0xF5, "blue"=>0xF5),
"yellowgreen"=>array( "red"=>0x9A, "green"=>0xCD, "blue"=>0x32)
);
and then simply get the RGB values via $maroon = $Colors['maroon'];
Further reference:
- http://www.w3.org/TR/css3-color/#html4
- http://www.crockford.com/wrrrld/color.html
How about this?
function color2hex ($nm)
{
preg_match_all ("/\d{1,3}/", (new ImagickPixel ($nm))->getColorAsString (), $matches);
[$r, $g, $b] = $matches[0];
return sprintf ("#%06X", $r * 65536 + $g * 256 + $b);
}
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