Al Held was an American Abstract expressionist painter. He was particularly well known for his large scale Hard-edge paintings. As an artist, multiple stylistic changes occurred throughout his career, however, none of these occurred at the same time as any popular emerging style or acted against a particular art form. In the 1950s his style reflected the abstract expressionist tone and then transitioned to a geometric style in the 1960s. During the 1980s, there was a shift into painting that emphasized bright geometric space that's deepness reflected infinity. From 1963 to 1980 he was a professor of art at Yale University.

Hard-edge painting is painting in which abrupt transitions are found between color areas. Color areas often consist of one unvarying color. The Hard-edge painting style is related to Geometric abstraction, Op Art, Post-painterly Abstraction, and Color Field painting.