Found this article, I don't know if it's real or not but definately for the di- and tri-chromacies. Some articles say "1st human tetrachrome found," that it's "more popular in women," or that "only women (2 X chromosomes) can recieve it" - I'm lost. Still an interesting thing, I counted 40 but may have miscounted, suggested by the highest range they supply was 39. There were only three clumps of colours that I did not see more colours within, otherwise I could see another colour in an equal distance apart from the last. Most people replied something within the range for tetrachromacy, I think it just had to do with how well they paid attention. Some people replied in the 50s - I'm not counting the top and bottom parts or the shady-looking area between colours.