A totally color blind artist has been fitted with a device that "sees" colors for him. It sounds a tone in his ear so that he knows what color he is looking at. It can recognize 360 colors. He has very good hearing and can tell all those tones apart.

http://entertainment.timesonline.co.uk/ ... 423446.ece

He is not the first color blind artist I've heard of. About a century ago there was a noted American illustrator with defective color vision who worked in color by making careful use of labeled paints.

Now, if they can just come up with a device that lets you actually see all the colors. Maybe then I can see what a rainbow really looks like!