The Smithsonian American Art Museum is offering an array of public programs to accompany the exhibition "Color as Field: American Painting, 1950-1975," which features 39 beautiful paintings that represent one of the crowning achievements of postwar American abstract art. The Color Field school, a group that emerged in the United States in the 1950s, is characterized by its utilization of pouring, staining, spraying or painting thinned paint onto raw canvas to create vast chromatic expanses.