BBC News has raised the problem of colour blindness as it effects games players (title link). The problem is much wider than games. I know one completely colour blind man who must remember the sequence of traffic lights when driving in order to know when to stop, go or be ready. Artists use colours to trick the eye into seeing depth; red is a "close" colour, blue a "distant" colour. I first became interested in this subject years ago when writing a programme on 16-bit graphics for the Atari ST. Did I have any colour-perception defect I needed to know about? I borrowed a colour blindness test from my library, more extensive than the quickie offered by BBC Suffolk (CLICK). I vaguely recall about 20 pictures. I made 100%. What can you see in the sample test here? People with normal vision should read the number 8. Those with red-green defects will read 3. Someone who is totally colour blind won't see any number at all. That shouldn't stop you becoming an artist. Comics publishers often employ "colourists" to fill in the India ink drawings made by the main artist. And of course there is sculpture.