The subject of these two prints is color . The artists carefully chose which colors to use and which colors to place next to each other. These two artists used analogous colors. Look at the painting on the right by Anne Truitt. Complementary colors are opposite each other on a color wheel like red and green or blue and orange.
Artists sometimes use color to create an optical illusion.
More information on Josef Albers. In this print, the illusion of space and depth is created by diagonal lines . Diagonal lines also create movement in a work of art. Movement is a principle of design that shows action by arranging the parts of the composition to give motion to the piece. Imagine diagonal lines connecting the squares and lines in the Bolotowsky print on the left.