A photographer friend of mine is also color blind. I found a book with all sorts of colorful images with accompanying descriptions and large patches of the colors used in the pictures. He scanned the patches and could read off the RGB numbers and use that to help determine what colors he was dealing with in his own images. Can't remember the name of the book unfortunately. It wasn't highly accurate, but got him in the right ball park. Now I believe there are sites on the internet that give preferred RGB numbers for skin tones etc. Have to use the Margulis approach and go by the numbers. Andy PS. I'm always surprised at how many people in the art creation business are color blind. You'd think those two things would be mutually exclusive. -----Original Message----- On Behalf Of Chris Murphy ....................... Anyway, I think as long as you convey certain "no-no's" like green or blue people looking sick or dead, he should understand this. ............................ Chris