Richard Diebenkorn treated printmaking as an extension of his celebrated painting career, often working on these mediums in tandem. Printmaking allowed Diebenkorn to challenge himself and to push the boundaries of his abstractions, inspiring him to convey the flat quality of geometric shapes on a compressed, two-dimensional surface. Beginning with monotype, Diebenkorn later experimented with other techniques such as etching, which he used for Indigo Horizon.

Indigo Horizon combines two of Diebenkorn’s major interests: color fields and geometric shapes. The Ocean Park series, a collection of 145 paintings created over 20 years, communicates the geometry of his Los Angeles neighborhood of the same name, as seen from his studio. His focus on light, enhanced by the architectural qualities of his windows, created a lyrical work further amplified by the print medium.