This following are named colors defined in CSS3, supported by all browsers.
#000000hsl(0, 0%, 0%)#696969hsl(0, 0%, 41%)#696969hsl(0, 0%, 41%)#808080hsl(0, 0%, 50%)#808080hsl(0, 0%, 50%)#a9a9a9hsl(0, 0%, 66%)#a9a9a9hsl(0, 0%, 66%)#c0c0c0hsl(0, 0%, 75%)#d3d3d3hsl(0, 0%, 82%)#d3d3d3hsl(0, 0%, 82%)#dcdcdchsl(0, 0%, 86%)#f5f5f5hsl(0, 0%, 96%)#ffffffhsl(0, 0%, 100%)#bc8f8fhsl(0, 25%, 64%)#cd5c5chsl(0, 53%, 58%)#a52a2ahsl(0, 59%, 40%)#b22222hsl(0, 67%, 41%)#f08080hsl(0, 78%, 72%)#800000hsl(0, 100%, 25%)#8b0000hsl(0, 100%, 27%)#ff0000hsl(0, 100%, 50%)#fffafahsl(0, 100%, 99%)#fa8072hsl(6, 93%, 71%)#ffe4e1hsl(6, 100%, 94%)#ff6347hsl(9, 100%, 63%)#e9967ahsl(15, 71%, 69%)#ff7f50hsl(16, 100%, 65%)#ff4500hsl(16, 100%, 50%)#ffa07ahsl(17, 100%, 73%)#a0522dhsl(19, 56%, 40%)#d2691ehsl(24, 74%, 47%)#8b4513hsl(24, 75%, 30%)#fff5eehsl(24, 100%, 96%)#f4a460hsl(27, 87%, 66%)#ffdab9hsl(28, 100%, 86%)#cd853fhsl(29, 58%, 52%)#faf0e6hsl(30, 66%, 94%)#ffe4c4hsl(32, 100%, 88%)#ff8c00hsl(32, 100%, 50%)#deb887hsl(33, 56%, 70%)#d2b48chsl(34, 43%, 68%)#faebd7hsl(34, 77%, 91%)#ffebcdhsl(35, 100%, 90%)#ffdeadhsl(35, 100%, 83%)#ffefd5hsl(37, 100%, 91%)#ffe4b5hsl(38, 100%, 85%)#ffa500hsl(38, 100%, 50%)#f5deb3hsl(39, 76%, 83%)#fdf5e6hsl(39, 85%, 94%)#fffaf0hsl(39, 100%, 97%)#daa520hsl(42, 74%, 49%)#b8860bhsl(42, 88%, 38%)#fff8dchsl(47, 100%, 93%)#ffd700hsl(50, 100%, 50%)#fffacdhsl(53, 100%, 90%)#eee8aahsl(54, 66%, 80%)#f0e68chsl(54, 76%, 74%)#bdb76bhsl(55, 38%, 58%)#f5f5dchsl(60, 55%, 91%)#fafad2hsl(60, 79%, 90%)#808000hsl(60, 100%, 25%)#fffff0hsl(60, 100%, 97%)#ffffe0hsl(60, 100%, 93%)#ffff00hsl(60, 100%, 50%)#6b8e23hsl(79, 60%, 34%)#9acd32hsl(79, 60%, 50%)#556b2fhsl(82, 38%, 30%)#adff2fhsl(83, 100%, 59%)#7cfc00hsl(90, 100%, 49%)#7fff00hsl(90, 100%, 50%)#8fbc8fhsl(120, 25%, 64%)#228b22hsl(120, 60%, 33%)#32cd32hsl(120, 60%, 50%)#90ee90hsl(120, 73%, 74%)#98fb98hsl(120, 92%, 79%)#006400hsl(120, 100%, 19%)#008000hsl(120, 100%, 25%)#00ff00hsl(120, 100%, 50%)#f0fff0hsl(120, 100%, 97%)#3cb371hsl(146, 49%, 46%)#2e8b57hsl(146, 50%, 36%)#00ff7fhsl(149, 100%, 50%)#f5fffahsl(149, 100%, 98%)#00fa9ahsl(156, 100%, 49%)#66cdaahsl(159, 50%, 60%)#7fffd4hsl(159, 100%, 74%)#40e0d0hsl(174, 72%, 56%)#20b2aahsl(176, 69%, 41%)#48d1cchsl(177, 59%, 55%)#2f4f4fhsl(180, 25%, 24%)#2f4f4fhsl(180, 25%, 24%)#afeeeehsl(180, 64%, 80%)#00ffffhsl(180, 100%, 50%)#00ffffhsl(180, 100%, 50%)#008b8bhsl(180, 100%, 27%)#00ced1hsl(180, 100%, 40%)#008080hsl(180, 100%, 25%)#e0ffffhsl(180, 100%, 93%)#f0ffffhsl(180, 100%, 97%)#5f9ea0hsl(181, 25%, 50%)#b0e0e6hsl(186, 51%, 79%)#add8e6hsl(194, 53%, 79%)#00bfffhsl(195, 100%, 50%)#87ceebhsl(197, 71%, 72%)#87cefahsl(202, 91%, 75%)#4682b4hsl(207, 44%, 49%)#f0f8ffhsl(208, 100%, 97%)#1e90ffhsl(209, 100%, 55%)#708090hsl(210, 12%, 50%)#708090hsl(210, 12%, 50%)#778899hsl(210, 14%, 53%)#778899hsl(210, 14%, 53%)#b0c4dehsl(213, 41%, 78%)#6495edhsl(218, 79%, 66%)#4169e1hsl(225, 72%, 56%)#191970hsl(240, 63%, 26%)#e6e6fahsl(240, 66%, 94%)#0000ffhsl(240, 100%, 50%)#00008bhsl(240, 100%, 27%)#0000cdhsl(240, 100%, 40%)#000080hsl(240, 100%, 25%)#f8f8ffhsl(240, 100%, 98%)#483d8bhsl(248, 38%, 39%)#6a5acdhsl(248, 53%, 57%)#7b68eehsl(248, 79%, 67%)#9370dbhsl(259, 59%, 64%)#8a2be2hsl(271, 75%, 52%)#4b0082hsl(274, 100%, 25%)#9932cchsl(280, 60%, 49%)#9400d3hsl(282, 100%, 41%)#ba55d3hsl(288, 58%, 58%)#d8bfd8hsl(300, 24%, 79%)#dda0ddhsl(300, 47%, 74%)#ee82eehsl(300, 76%, 72%)#800080hsl(300, 100%, 25%)#8b008bhsl(300, 100%, 27%)#ff00ffhsl(300, 100%, 50%)#ff00ffhsl(300, 100%, 50%)#da70d6hsl(302, 58%, 64%)#c71585hsl(322, 80%, 43%)#ff1493hsl(327, 100%, 53%)#ff69b4hsl(330, 100%, 70%)#fff0f5hsl(339, 100%, 97%)#db7093hsl(340, 59%, 64%)#dc143chsl(348, 83%, 47%)#ffc0cbhsl(349, 100%, 87%)#ffb6c1hsl(350, 100%, 85%)For various color syntax, see: CSS Color Basics.
http://www.w3.org/TR/css3-color/#svg-color