Edward Hopper, Chair Car, 1965.
Georgia O’Keeffe, Blue Flower, 1918.
Roy Lichtenstein, Hopeless, 1967.
The use of color in the first two paintings is different than the third in that the first two are more blended, the colors are a combination of other colors. In the third painting, the yellow, red, blue, and other colors are solids, and are separate from the other colors. The first painting uses mixing of colors to create shadows and texture, the second uses colors fading into each other also to crate shadows but more to show the change in color in the subject.
Kathe Kollwitz, Self-Portrait, Hand at the Forehead, 1910.
Georges Seurat, Self Portrait