Perhaps you could simply adapt the four color selectors available in the GIMP; the first is what you describe. The other three do the same thing, but with different interfaces.
Where can they be found? Obviously, one wants to change more than one color component at the same time... Not so obvious to me. Changing more than one at a time can be useful, but I think changing one at a time is also useful, especially if you can move from one to the next easily. _______________________________________________ Emacs-devel mailing list Emacs-devel@gnu.org http://lists.gnu.org/mailman/listinfo/emacs-devel