Most people know something about color theory. In kindergarten, you learn that when you mix yellow Play-Doh and blue Play-Doh, you get green Play-Doh -- and that when you mix everything together, you get mud. In high school art class, you learn that warm colors advance and cool colors recede, that red excites us and blue calms us, that complementary colors like blue and orange radiate against each other, causing... More >>>