It's basically mono-chromatic -- even the brownish tones are muted orange, but, of course, the hint of blue and the black which is not a color but the absence of color. The landmark birth of modern art was the Armory Show in 1913 and the most talked about piece of art was Duchamp's "Nude Descending a Staircase," a painting in mono-chromatics towards the amber ushering in Futurism (he was more than a Dadaist). Duchamp painted three versions of that image, and many in different chroma. Exactly what he was doing -- breaking up areas with variety or nuance to show motion.
