Johannes Itten (1888–1967) was a Swiss painter, designer, and teacher, best known for his contributions to color theory and the Bauhaus school. His main features include: 1. Color Theory – Itten developed a systematic approach to color, including the 12-hue color wheel and the concept of subjective color perception. His book The Art of Color (1961) remains influential. 2. Seven Color Contrasts – He identified key contrasts in color, such as contrast of hue, light-dark, cold-warm, complementary,