For instance, if you mix Cadmium Red + Ultramarine Blue, you'll likely be sadly disappointed. If you were expecting a deep rich Violet (Purple), the resulting Brown will be a total surprise. The problem is paint pigment never works like that in real life. However, as I wrote in a previous Color Wheel post, color is not an exact science. Of course that's what they teach us in school. So in other words, you could conceivably mix gazillions of colors with only three pure Primar y pigments of Yellow, Red and Blue.
