Omar Rayo Reyes (January 20, 1928 – June 7, 2010) was a renowned Colombian painter, sculptor, caricaturist and plastic artist. He won the 1970 Salón de Artistas Colombianos. Rayo worked with abstract geometry primarily employing black, white, red and yellow. He was part of the Op Art movement. Rayo's work shows that geometric art is as much a part of the past as it is of the future. He used traces of the past to discover new ways to present visual and geometric sketches.
One of his most celebrated exhibitions was carried out in the National Room of the Museum of the Palace of fine arts of Mexico, titled "20 years, 100 works: Omar Rayo."