At the time Wassily Kandinsky painted Yellow-Red-Blue (1925), he was a professor at the Bauhaus. In this work, the painter applies the principles of color and analytical drawing that he also taught to his students and developed in several theoretical writings. The paintings of this period are highly colorful and highly geometric. The three primary colors and the artist’s favored shapes—triangle, square, circle—become true epic characters. “Form is the outward expression of inner content,” Kandinsky said.