Hex is quite simple really. If you can do RGB, you can do hex. 1 = F 0 = 0IE: Red = FF0000 and 1 0 0Blue = 0000FF and 0 0 1Green = 00FF00 and 0 1 0Also O is 0.5, but that is slightly more complicated to use.
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http://html-color-codes.com/That's the one I use.Similar to Dread's.