HTML里，顏色有兩種表示方式。一種是用顏色名稱表示，比如blue表示藍色。另外一種是用16進制的數值表示RGB的顏色值。RGB是Red，Green，Blue意思，RGB每個原色的最小值是0，最大值是255，如果換算成16進制表示，就是(#00)，(#FF)。比如白色的RGB(255,255,255)，就用#FFFFFF表示；還有黑色的RGB(0,0,0)，就用#000000表示。
注：在W3C制定的HTML 4.0標準中，只有16種顏色可以用顏色名稱表示(aqua, black, blue, fuchsia, gray, green, lime, maroon, navy, olive, purple, red, silver, teal, white, and yellow)，其它的顏色都要用16進制RGB顏色值表示。
當然，現在的瀏覽器支持更多的顏色名稱。不過為保險起見，建議你還是采用16進制RGB顏色值來表示顏色。并且在值前加上#這個符號。
為了方便大家找到合適的顏色，我們在這里列了一些顏色說明，以供大家參考，不妨作為一種速查工具。
Web安全顏色
以前，很多電腦顯示器最多支持256色，因此出現了216種Web安全顏色，以保證網頁的顏色能夠正確顯示。
那為什么不是256種Web安全顏色呢？因為Microsoft和Mac操作系統有40種不同的系統保留顏色。
以下就是216種Web安全顏色：
| #000000 |
#000033 |
#000066 |
#000099 |
#0000cc |
#0000ff |
| #003300 |
#003333 |
#003366 |
#003399 |
#0033cc |
#0033ff |
| #006600 |
#006633 |
#006666 |
#006699 |
#0066cc |
#0066ff |
| #009900 |
#009933 |
#009966 |
#009999 |
#0099cc |
#0099ff |
| #00cc00 |
#00cc33 |
#00cc66 |
#00cc99 |
#00cccc |
#00ccff |
| #00ff00 |
#00ff33 |
#00ff66 |
#00ff99 |
#00ffcc |
#00ffff |
| #330000 |
#330033 |
#330066 |
#330099 |
#3300cc |
#3300ff |
| #333300 |
#333333 |
#333366 |
#333399 |
#3333cc |
#3333ff |
| #336600 |
#336633 |
#336666 |
#336699 |
#3366cc |
#3366ff |
| #339900 |
#339933 |
#339966 |
#339999 |
#3399cc |
#3399ff |
| #33cc00 |
#33cc33 |
#33cc66 |
#33cc99 |
#33cccc |
#33ccff |
| #33ff00 |
#33ff33 |
#33ff66 |
#33ff99 |
#33ffcc |
#33ffff |
| #660000 |
#660033 |
#660066 |
#660099 |
#6600cc |
#6600ff |
| #663300 |
#663333 |
#663366 |
#663399 |
#6633cc |
#6633ff |
| #666600 |
#666633 |
#666666 |
#666699 |
#6666cc |
#6666ff |
| #669900 |
#669933 |
#669966 |
#669999 |
#6699cc |
#6699ff |
| #66cc00 |
#66cc33 |
#66cc66 |
#66cc99 |
#66cccc |
#66ccff |
| #66ff00 |
#66ff33 |
#66ff66 |
#66ff99 |
#66ffcc |
#66ffff |
| #990000 |
#990033 |
#990066 |
#990099 |
#9900cc |
#9900ff |
| #993300 |
#993333 |
#993366 |
#993399 |
#9933cc |
#9933ff |
| #996600 |
#996633 |
#996666 |
#996699 |
#9966cc |
#9966ff |
| #999900 |
#999933 |
#999966 |
#999999 |
#9999cc |
#9999ff |
| #99cc00 |
#99cc33 |
#99cc66 |
#99cc99 |
#99cccc |
#99ccff |
| #99ff00 |
#99ff33 |
#99ff66 |
#99ff99 |
#99ffcc |
#99ffff |
| #cc0000 |
#cc0033 |
#cc0066 |
#cc0099 |
#cc00cc |
#cc00ff |
| #cc3300 |
#cc3333 |
#cc3366 |
#cc3399 |
#cc33cc |
#cc33ff |
| #cc6600 |
#cc6633 |
#cc6666 |
#cc6699 |
#cc66cc |
#cc66ff |
| #cc9900 |
#cc9933 |
#cc9966 |
#cc9999 |
#cc99cc |
#cc99ff |
| #cccc00 |
#cccc33 |
#cccc66 |
#cccc99 |
#cccccc |
#ccccff |
| #ccff00 |
#ccff33 |
#ccff66 |
#ccff99 |
#ccffcc |
#ccffff |
| #ff0000 |
#ff0033 |
#ff0066 |
#ff0099 |
#ff00cc |
#ff00ff |
| #ff3300 |
#ff3333 |
#ff3366 |
#ff3399 |
#ff33cc |
#ff33ff |
| #ff6600 |
#ff6633 |
#ff6666 |
#ff6699 |
#ff66cc |
#ff66ff |
| #ff9900 |
#ff9933 |
#ff9966 |
#ff9999 |
#ff99cc |
#ff99ff |
| #ffcc00 |
#ffcc33 |
#ffcc66 |
#ffcc99 |
#ffcccc |
#ffccff |
| #ffff00 |
#ffff33 |
#ffff66 |
#ffff99 |
#ffffcc |
#ffffff |
微軟支持的顏色名稱
下面是微軟IE4.0以上都支持的顏色名稱：
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) |
darkkhaki
(#bdb76b) |
darkmagenta
(#8b008b) |
darkolivegreen
(#556b2f) |
darkorange
(#ff8c00) |
darkorchid
(#9932cc) |
darkred
(#8b0000) |
darksalmon
(#e9967a) |
darkseagreen
(#8fbc8b) |
darkslateblue
(#483d8b) |
darkslategray
(#2f4f4f) |
darkturquoise
(#00ced1) |
darkviolet
(#9400d3) |
deeppink
(#ff1493) |
deepskyblue
(#00bfff) |
dimgray
(#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) |
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) |
lightgreen
(#90ee90) |
lightgrey
(#d3d3d3) |
lightpink
(#ffb6c1) |
lightsalmon
(#ffa07a) |
lightseagreen
(#20b2aa) |
lightskyblue
(#87cefa) |
lightslategray
(#778899) |
lightsteelblue
(#b0c4de) |
lightyellow
(#ffffe0) |
lime
(#00ff00) |
limegreen
(#32cd32) |
linen
(#faf0e6) |
magenta
(#ff00ff) |
maroon
(#800000) |
mediumaquamarine
(#66cdaa) |
mediumblue
(#0000cd) |
mediumorchid
(#ba55d3) |
mediumpurple
(#9370db) |
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) |
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) |