From the New York City The Museum of Modern Art:
Matisse took Woman on a High Stool (Germaine Raynal) through many changes as he worked, particularly the seated figure. Perhaps the greatest alteration was in color: vivid blue, green, and orange-red areas have been mostly covered with layers of gray. The painting shares its simplified geometric forms, heavy contouring, and austere palette with the work of Paul Cézanne and the Cubist paintings Pablo Picasso and Georges Braque made a few years earlier.