index/src/Colour/ColourNamed.php

<?php
namespace Index\Colour;

class ColourNamed extends Colour {
    private string $name;
    private int $red = 0;
    private int $green = 0;
    private int $blue = 0;
    private bool $transparent;

    public function __construct(string $name) {
        $this->name = strtolower($name);

        $raw = self::COLOURS[$name] ?? -1;
        $this->transparent = $raw === -1;

        if($raw === -1) {
            $this->transparent = true;
        } else {
            $this->transparent = false;
            $this->red = ($raw >> 16) & 0xFF;
            $this->green = ($raw >> 8) & 0xFF;
            $this->blue = ($raw) & 0xFF;
        }
    }

    public function getName(): string {
        return $this->name;
    }

    public function isTransparent(): bool {
        return $this->transparent;
    }

    public function getRed(): int {
        return $this->red;
    }

    public function getGreen(): int {
        return $this->green;
    }

    public function getBlue(): int {
        return $this->blue;
    }

    public function getAlpha(): float {
        return $this->transparent ? 0.0 : 1.0;;
    }

    public function shouldInherit(): bool {
        return false;
    }

    public function __toString(): string {
        return $this->name;
    }

    private const COLOURS = [
        // CSS Level 1
        'black' => 0x000000,
        'silver' => 0xC0C0C0,
        'gray' => 0x808080,
        'white' => 0xFFFFFF,
        'maroon' => 0x800000,
        'red' => 0xFF0000,
        'purple' => 0x800080,
        'fuchsia' => 0xFF00FF,
        'green' => 0x008000,
        'lime' => 0x00FF00,
        'olive' => 0x808000,
        'yellow' => 0xFFFF00,
        'navy' => 0x000080,
        'blue' => 0x0000FF,
        'teal' => 0x008080,
        'aqua' => 0x00FFFF,

        // CSS Level 2
        'orange' => 0xFFA500,

        // CSS Level 3
        'aliceblue' => 0xF0F8FF,
        'antiquewhite' => 0xFAEBD7,
        'aquamarine' => 0x7FFFD4,
        'azure' => 0xF0FFFF,
        'beige' => 0xF5F5DC,
        'bisque' => 0xFFE4C4,
        'blanchedalmond' => 0xFFEBCD,
        'blueviolet' => 0x8A2BE2,
        'brown' => 0xA52A2A,
        'burlywood' => 0xDEB887,
        'cadetblue' => 0x5F9EA0,
        'chartreuse' => 0x7FFF00,
        'chocolate' => 0xD2691E,
        'coral' => 0xFF7F50,
        'cornflowerblue' => 0x6495ED,
        'cornsilk' => 0xFFF8DC,
        'crimson' => 0xDC143C,
        'cyan' => 0x00FFFF,
        'darkblue' => 0x00008B,
        'darkcyan' => 0x008B8B,
        'darkgoldenrod' => 0xB8860B,
        'darkgray' => 0xA9A9A9,
        'darkgreen' => 0x006400,
        'darkgrey' => 0xA9A9A9,
        'darkkhaki' => 0xBDB76B,
        'darkmagenta' => 0x8B008B,
        'darkolivegreen' => 0x556B2F,
        'darkorange' => 0xFF8C00,
        'darkorchid' => 0x9932CC,
        'darkred' => 0x8B0000,
        'darksalmon' => 0xE9967A,
        'darkseagreen' => 0x8FBC8F,
        'darkslateblue' => 0x483D8B,
        'darkslategray' => 0x2F4F4F,
        'darkslategrey' => 0x2F4F4F,
        'darkturquoise' => 0x00CED1,
        'darkviolet' => 0x9400D3,
        'deeppink' => 0xFF1493,
        'deepskyblue' => 0x00BFFF,
        'dimgray' => 0x696969,
        'dimgrey' => 0x696969,
        'dodgerblue' => 0x1E90FF,
        'firebrick' => 0xB22222,
        'floralwhite' => 0xFFFAF0,
        'forestgreen' => 0x228B22,
        'gainsboro' => 0xDCDCDC,
        'ghostwhite' => 0xF8F8FF,
        'gold' => 0xFFD700,
        'goldenrod' => 0xDAA520,
        'greenyellow' => 0xADFF2F,
        'grey' => 0x808080,
        'honeydew' => 0xF0FFF0,
        'hotpink' => 0xFF69B4,
        'indianred' => 0xCD5C5C,
        'indigo' => 0x4B0082,
        'ivory' => 0xFFFFF0,
        'khaki' => 0xF0E68C,
        'lavender' => 0xE6E6FA,
        'lavenderblush' => 0xFFF0F5,
        'lawngreen' => 0x7CFC00,
        'lemonchiffon' => 0xFFFACD,
        'lightblue' => 0xADD8E6,
        'lightcoral' => 0xF08080,
        'lightcyan' => 0xE0FFFF,
        'lightgoldenrodyellow' => 0xFAFAD2,
        'lightgray' => 0xD3D3D3,
        'lightgreen' => 0x90EE90,
        'lightgrey' => 0xD3D3D3,
        'lightpink' => 0xFFB6C1,
        'lightsalmon' => 0xFFA07A,
        'lightseagreen' => 0x20B2AA,
        'lightskyblue' => 0x87CEFA,
        'lightslategray' => 0x778899,
        'lightslategrey' => 0x778899,
        'lightsteelblue' => 0xB0C4DE,
        'lightyellow' => 0xFFFFE0,
        'limegreen' => 0x32CD32,
        'linen' => 0xFAF0E6,
        'magenta' => 0xFF00FF,
        'mediumaquamarine' => 0x66CDAA,
        'mediumblue' => 0x0000CD,
        'mediumorchid' => 0xBA55D3,
        'mediumpurple' => 0x9370DB,
        'mediumseagreen' => 0x3CB371,
        'mediumslateblue' => 0x7B68EE,
        'mediumspringgreen' => 0x00FA9A,
        'mediumturquoise' => 0x48D1CC,
        'mediumvioletred' => 0xC71585,
        'midnightblue' => 0x191970,
        'mintcream' => 0xF5FFFA,
        'mistyrose' => 0xFFE4E1,
        'moccasin' => 0xFFE4B5,
        'navajowhite' => 0xFFDEAD,
        'oldlace' => 0xFDF5E6,
        'olivedrab' => 0x6B8E23,
        'orangered' => 0xFF4500,
        'orchid' => 0xDA70D6,
        'palegoldenrod' => 0xEEE8AA,
        'palegreen' => 0x98FB98,
        'paleturquoise' => 0xAFEEEE,
        'palevioletred' => 0xDB7093,
        'papayawhip' => 0xFFEFD5,
        'peachpuff' => 0xFFDAB9,
        'peru' => 0xCD853F,
        'pink' => 0xFFC0CB,
        'plum' => 0xDDA0DD,
        'powderblue' => 0xB0E0E6,
        'rosybrown' => 0xBC8F8F,
        'royalblue' => 0x4169E1,
        'saddlebrown' => 0x8B4513,
        'salmon' => 0xFA8072,
        'sandybrown' => 0xF4A460,
        'seagreen' => 0x2E8B57,
        'seashell' => 0xFFF5EE,
        'sienna' => 0xA0522D,
        'skyblue' => 0x87CEEB,
        'slateblue' => 0x6A5ACD,
        'slategray' => 0x708090,
        'slategrey' => 0x708090,
        'snow' => 0xFFFAFA,
        'springgreen' => 0x00FF7F,
        'steelblue' => 0x4682B4,
        'tan' => 0xD2B48C,
        'thistle' => 0xD8BFD8,
        'tomato' => 0xFF6347,
        'transparent' => -1,
        'turquoise' => 0x40E0D0,
        'violet' => 0xEE82EE,
        'wheat' => 0xF5DEB3,
        'whitesmoke' => 0xF5F5F5,
        'yellowgreen' => 0x9ACD32,

        // CSS Level 4
        'rebeccapurple' => 0x663399,
    ];
}