Rainbow: Thelonious Monk, Devil at the Keyboard is a lithograph on thin velin by Willem de Kooning, published in 1972 by Shorewood Publishing, New York, for the Rainbow Foundation. The image depicts an expressive, loosely rendered portrait of the jazz pianist Thelonious Monk, his hands on a piano that dissolves into a devil's pitchfork, the word "RAINBOW" spelled above and below in large, freely brushed multicolor letters. Signed in the plate.
