Oli Sihvonen (1921–1991) was a post-World War II American artist known for hard-edge abstract paintings. Sihvonen's style was greatly influenced by Josef Albers who taught him color theory and Bauhaus aesthetics at Black Mountain College in the 1940s. Sihvonen was also influenced by Russian Constructivism, Piet Mondrian, and Pierre Matisse. His work has been linked to Abstract Expressionism, Minimalism, Hard-Edge and Op-Art.