Regex for CSS colors: hex, rgb(a), hsl(a) and named colors (149 + transparant)

css-color-regex

/(#(?:[0-9a-fA-F]{2}){2,4}$|(#[0-9a-fA-F]{3}$)|(rgb|hsl)a?\((-?\d+%?[,\s]+){2,3}\s*[\d\.]+%?\)$|black$|silver$|gray$|whitesmoke$|maroon$|red$|purple$|fuchsia$|green$|lime$|olivedrab$|yellow$|navy$|blue$|teal$|aquamarine$|orange$|aliceblue$|antiquewhite$|aqua$|azure$|beige$|bisque$|blanchedalmond$|blueviolet$|brown$|burlywood$|cadetblue$|chartreuse$|chocolate$|coral$|cornflowerblue$|cornsilk$|crimson$|darkblue$|darkcyan$|darkgoldenrod$|darkgray$|darkgreen$|darkgrey$|darkkhaki$|darkmagenta$|darkolivegreen$|darkorange$|darkorchid$|darkred$|darksalmon$|darkseagreen$|darkslateblue$|darkslategray$|darkslategrey$|darkturquoise$|darkviolet$|deeppink$|deepskyblue$|dimgray$|dimgrey$|dodgerblue$|firebrick$|floralwhite$|forestgreen$|gainsboro$|ghostwhite$|goldenrod$|gold$|greenyellow$|grey$|honeydew$|hotpink$|indianred$|indigo$|ivory$|khaki$|lavenderblush$|lavender$|lawngreen$|lemonchiffon$|lightblue$|lightcoral$|lightcyan$|lightgoldenrodyellow$|lightgray$|lightgreen$|lightgrey$|lightpink$|lightsalmon$|lightseagreen$|lightskyblue$|lightslategray$|lightslategrey$|lightsteelblue$|lightyellow$|limegreen$|linen$|mediumaquamarine$|mediumblue$|mediumorchid$|mediumpurple$|mediumseagreen$|mediumslateblue$|mediumspringgreen$|mediumturquoise$|mediumvioletred$|midnightblue$|mintcream$|mistyrose$|moccasin$|navajowhite$|oldlace$|olive$|orangered$|orchid$|palegoldenrod$|palegreen$|paleturquoise$|palevioletred$|papayawhip$|peachpuff$|peru$|pink$|plum$|powderblue$|rosybrown$|royalblue$|saddlebrown$|salmon$|sandybrown$|seagreen$|seashell$|sienna$|skyblue$|slateblue$|slategray$|slategrey$|snow$|springgreen$|steelblue$|tan$|thistle$|tomato$|transparent$|turquoise$|violet$|wheat$|white$|yellowgreen$|rebeccapurple$)/i