This is a very interesting article to anyone into art. I see 33 different colours in the bands that they show – which is just one more than average. Apparently some people see 39! 25% of the population. That said – wow – this has to affect how I make a painting, and how each individual observes it! Here’s the link: Diana Derval – 25% of People Have a 4th Cone How many colours do you see?