simple-rgb
simple-rgb is a library for manipulating RGB and HSV color values. It is intended for working with CSS color schemes - it's not really optimized for intense image processing.

ASDF-install package (obsolete) http://simple-rgb.googlecode.com/files/simple-rgb-0.02.tar.gz

Version 0.02 fixes a silly spelling error in the library. I evidently thought colors could be polite, and misspelled "complement" as "compliment."

graphics library