Some people have no sense of color. To them, blue is blue, green is green, etc. For those of us who see the myriad of shades of every color, it's a mystery why they don't see it as we do. When I went to college, I attended a Catholic University that required 21 hours of Religion if you were Catholic. Not being Catholic, I took those classes in art, for which I will be eternally grateful. It has served me extremely well in so many aspects of life.