From 1919 to 1922, Itten taught at the Bauhaus, developing the innovative "preliminary course"Ruhrberg, Karl, and Walther, Ingo F. (2000). Art of the 20th Century, p. 177. Taschen. . which was to teach students the basics of material characteristics, composition, and color. "Itten theorized seven types of color contrast and devised exercises to teach them. His color contrasts include[d] (1) contrast by hue, (2) contrast by value, (3) contrast by temperature, (4) contrast by complements (neutralization), (5) simultaneous contrast (from Chevreuil), (6) contrast by saturation (mixtures with gray), and (7) contrast by extension (from Goethe)."
