You can use the hexadecimal, the RGB values or you can use the predefined words to specify colors of a HTML page. Below is a chart of the main browser colors and their names. Color names are not supported by the W3C standards. If you want to write correct HTML you should use the hexadecimal values (in HTML you place # before the color value to indicate hexadecimal value).

ALICEBLUE #F0F8FF - RGB: 240,248,255		ANTIQUEWHITE #FAEBD7 - RGB: 250,235,215
AQUA #00FFFF - RGB: 0,255,255		AQUAMARINE #7FFFD4 - RGB: 127,255,212
AZURE #F0FFFF - RGB: 240,255,255		BEIGE #F5F5DC - RGB: 245,245,220
BISQUE #FFE4C4 - RGB: 255,228,196		BLACK #000000 - RGB: 0,0,0
BLANCHEDALMOND #FFEBCD - RGB: 255,235,205		BLUE #0000FF - RGB: 0,0,255
BLUEVIOLET #8A2BE2 - RGB: 138,43,226		BROWN #A52A2A - RGB: 165,42,42
BURLYWOOD #DEB887 - RGB: 222,184,135		CADETBLUE #5F9EA0 - RGB: 95,158,160
CHARTREUSE #7FFF00 - RGB: 127,255,0		CHOCOLATE #D2691E - RGB: 210,105,30
CORAL #FF7F50 - RGB: 255,127,80		CORNFLOWERBLUE #6495ED - RGB: 100,149,237
CORNSILK #FFF8DC - RGB: 255,248,220		CRIMSON #DC143C - RGB: 220,20,60
CYAN #00FFFF - RGB: 0,255,255		DARKBLUE #00008B - RGB: 0,0,139
DARKCYAN #008B8B - RGB: 0,139,139		DARKGOLDENROD #B8860B - RGB: 184,134,11
DARKGRAY #A9A9A9 - RGB: 169,169,169		DARKGREEN #006400 - RGB: 0,100,0
DARKKHAKI #BDB76B - RGB: 189,183,107		DARKMAGENTA #8B008B - RGB: 139,0,139
DARKOLIVEGREEN #556B2F - RGB: 85,107,47		DARKORANGE #FF8C00 - RGB: 255,140,0
DARKORCHID #9932CC - RGB: 153,50,204		DARKRED #8B0000 - RGB: 139,0,0
DARKSALMON #E9967A - RGB: 233,150,122		DARKSEAGREEN #8FBC8F - RGB: 143,188,143
DARKSLATEBLUE #483D8B - RGB: 72,61,139		DARKSLATEGRAY #2F4F4F - RGB: 47,79,79
DARKTURQUOISE #00CED1 - RGB: 0,206,209		DARKVIOLET #9400D3 - RGB: 148,0,211
DEEPPINK #FF1493 - RGB: 255,20,147		DEEPSKYBLUE #00BFFF - RGB: 0,191,255
DIMGRAY #696969 - RGB: 105,105,105		DODGERBLUE #1E90FF - RGB: 30,144,255
FIREBRICK #B22222 - RGB: 178,34,34		FLORALWHITE #FFFAF0 - RGB: 255,250,240
FORESTGREEN #228B22 - RGB: 34,139,34		FUCHSIA #FF00FF - RGB: 255,0,255
GAINSBORO #DCDCDC - RGB: 220,220,220		GHOSTWHITE #F8F8FF - RGB: 248,248,255
GOLD #FFD700 - RGB: 255,215,0		GOLDENROD #DAA520 - RGB: 218,165,32
GRAY #808080 - RGB: 128,128,128		GREEN #008000 - RGB: 0,128,0
GREENYELLOW #ADFF2F - RGB: 173,255,47		HONEYDEW #F0FFF0 - RGB: 240,255,240
HOTPINK #FF69B4 - RGB: 255,105,180		INDIANRED #CD5C5C - RGB: 205,92,92
INDIGO #4B0082 - RGB: 75,0,130		IVORY #FFFFF0 - RGB: 255,255,240
KHAKI #FOE68C - RGB: 240,230,140		LAVENDER #E6E6FA - RGB: 230,230,250
LAVENDERBLUSH #FFF0F5 - RGB: 255,240,245		LAWNGREEN #7CFC00 - RGB: 124,252,0
LEMONCHIFFON #FFFACD - RGB: 255,250,205		LIGHTBLUE #ADD8E6 - RGB: 173,216,230
LIGHTCORAL #F08080 - RGB: 240,128,128		LIGHTCYAN #E0FFFF - RGB: 224,255,255
LIGHTGOLDENRODYELLOW #FAFAD2 - RGB: 250,250,210		LIGHTGREEN #90EE90 - RGB: 144,238,144
LIGHTGREY #D3D3D3 - RGB: 211,211,211		LIGHTPINK #FFB6C1 - RGB: 255,182,193
LIGHTSALMON #FFA07A - RGB: 255,160,122		LIGHTSEAGREEN #20B2AA - RGB: 32,178,170
LIGHTSKYBLUE #87CEFA - RGB: 135,206,250		LIGHTSLATEBLUE #8470FF - RGB: 132,112,255
LIGHTSLATEGRAY #778899 - RGB: 119,136,153		LIGHTSTEELBLUE #B0C4DE - RGB: 176,196,222
LIGHTYELLOW #FFFFE0 - RGB: 255,255,224		LIME #00FF00 - RGB: 0,255,0
LIMEGREEN #32CD32 - RGB: 50,205,50		LINEN #FAF0E6 - RGB: 250,240,230
MAGENTA #FF00FF - RGB: 255,0,255		MAROON #800000 - RGB: 128,0,0
MEDIUMAQUAMARINE #66CDAA - RGB: 102,205,170		MEDIUMBLUE #0000CD - RGB: 0,0,205
MEDIUMORCHID #BA55D3 - RGB: 186,85,211		MEDIUMPURPLE #9370D8 - RGB: 147,112,219
MEDIUMSEAGREEN #3CB371 - RGB: 60,179,113		MEDIUMSLATEBLUE #7B68EE - RGB: 123,104,238
MEDIUMSPRINGGREEN #00FA9A - RGB: 0,250,154		MEDIUMTURQUOISE #48D1CC - RGB: 72,209,204
MEDIUMVIOLETRED #C71585 - RGB: 199,21,133		MIDNIGHTBLUE #191970 - RGB: 25,25,112
MINTCREAM #F5FFFA - RGB: 245,255,250		MISTYROSE #FFE4E1 - RGB: 255,228,225
MOCCASIN #FFE4B5 - RGB: 255,228,181		NAVAJOWHITE #FFDEAD - RGB: 255,222,173
NAVY #000080 - RGB: 0,0,128		OLDLACE #FDF5E6 - RGB: 253,245,230
OLIVE #808000 - RGB: 128,128,0		OLIVEDRAB #6B8E23 - RGB: 107,142,35
ORANGE #FFA500 - RGB: 255,165,0		ORANGERED #FF4500 - RGB: 255,69,0
ORCHID #DA70D6 - RGB: 218,112,214		PALEGOLDENROD #EEE8AA - RGB: 238,232,170
PALEGREEN #98FB98 - RGB: 152,251,152		PALETURQUOISE #AFEEEE - RGB: 175,238,238
PALEVIOLETRED #DB7093 - RGB: 219,112,147		PAPAYAWHIP #FFEFD5 - RGB: 255,239,213
PEACHPUFF #FFDA89 - RGB: 255,218,185		PERU #CD853F - RGB: 205,133,63
PINK #FFC0CB - RGB: 255,192,203		PLUM #DDA0DD - RGB: 221,160,221
POWDERBLUE #B0E0E6 - RGB: 176,224,230		PURPLE #800080 - RGB: 128,0,128
RED #FF0000 - RGB: 255,0,0		ROSYBROWN #BC8F8F - RGB: 188,143,143
ROYALBLUE #4169E1 - RGB: 65,105,225		SADDLEBROWN #8B4513 - RGB: 139,69,19
SALMON #FA8072 - RGB: 250,128,114		SANDYBROWN #F4A460 - RGB: 244,164,96
SEAGREEN #2E8B57 - RGB: 46,139,87		SEASHELL #FFF5EE - RGB: 255,245,238
SIENNA #A0522D - RGB: 160,82,45		SILVER #C0C0C0 - RGB: 192,192,192
SKYBLUE #87CEEB - RGB: 135,206,235		SLATEBLUE #6A5ACD - RGB: 106,90,205
SLATEGRAY #708090 - RGB: 112,128,144		SNOW #FFFAFA - RGB: 255,250,250
SPRINGGREEN #00FF7F - RGB: 0,255,127		STEELBLUE #4682B4 - RGB: 70,130,180
TAN #D2B48C - RGB: 210,180,140		TEAL #008080 - RGB: 0,128,128
THISTLE #D8BFD8 - RGB: 216,191,216		TOMATO #FF6347 - RGB: 255,99,71
TURQUOISE #40E0D0 - RGB: 64,224,208		VIOLET #EE82EE - RGB: 238,130,238
VIOLETRED #DO2090 - RGB: 208,32,144		WHEAT #F5DEB3 - RGB: 245,222,179
WHITE #FFFFFF - RGB: 255,255,255		WHITESMOKE #F5F5F5 - RGB: 245,245,245
YELLOW #FFFF00 - RGB: 255,255,0		YELLOWGREEN #9ACD32 - RGB: 154,205,50