The 216 “Web Safe” Colors
Mouseover a color to see it as the background.

000000 333333 666666 999999 cccccc ffffff ffffcc ffff99 ffff66 ffff33 ffff00 cccc00 ffcc66 ffcc00 ffcc33 cc9900 cc9933 996600 ff9900 ff9933 cc9966 cc6600 996633 663300
ffcc99 ff9966 ff6600 cc6633 993300 660000 ff6633 cc3300 ff3300 ff0000 cc0000 990000 ffcccc cc9999 ff9999 cc6666 ff6666 ff3333 ff0033 cc0033 cc3333 993333 990033 330000
ff6699 ff3366 ff0066 cc3366 996666 663333 ff99cc ff3399 ff0099 cc0066 993366 660033 ff66cc ff00cc ff33cc cc6699 cc0099 990066 ffccff ff99ff ff66ff ff33ff ff00ff cc3399
cc99cc cc66cc cc00cc cc33cc 990099 993399 cc66ff cc33ff cc00ff 9900cc 996699 660066 cc99ff 9933cc 9933ff 9900ff 660099 663366 9966cc 9966ff 6600cc 6633cc 663399 330033
ccccff 9999ff 6633ff 6600ff 330099 330066 9999cc 6666ff 6666cc 666699 333399 333366 3333ff 3300ff 3300cc 3333cc 000099 000066 6699ff 3366ff 0000ff 0000cc 0033cc 000033
0066ff 0066cc 3366cc 0033ff 003399 003366 99ccff 6699cc 3399ff 0099ff 336699 006699 66ccff 33ccff 00ccff 3399cc 0099cc 99cccc 66cccc 669999 339999 006666 336666 ccffff
99ffff 66ffff 33ffff 00ffff 00cccc 99ffcc 66ffcc 33ffcc 00ffcc 33cccc 009999 66cc99 33cc99 00cc99 339966 009966 006633 003333 66ff99 33ff99 00ff99 33cc66 00cc66 009933
99ff99 66ff66 33ff66 00ff66 339933 006600 ccffcc 99cc99 66cc66 669966 336633 003300 33ff33 00ff33 00ff00 00cc00 33cc33 00cc33 66ff00 66ff33 33ff00 33cc00 339900 009900
ccff99 99ff66 66cc00 66cc33 669933 336600 99ff00 99ff33 99cc66 99cc00 99cc33 669900 ccff66 ccff00 ccff33 cccc99 666633 333300 cccc66 cccc33 999966 999933 999900 666600

[ thanks to bcarr.com ]