As a result, there are many different pure Yellow, Red and Blue pigment paints available. Paint is manufactured with organic, mineral and chemical pigments. They are unmixed pigments that can't be created by mixing other colors. To understand why, we need to look at paint pigments. A Primary Yellow, Red or Blue paint color usually refers to a paint that contains only one pigment. 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. So in other words, you could conceivably mix gazillions of colors with only three pure Primar y pigments of Yellow, Red and Blue. Of course that's what they teach us in school.