a Phillips 66 gas station whose colors were green and red. Robert Indiana described the original colors as "the red and green of that sign against the blue Hoosier sky". Still it is believed the colors were inspired also by the painting Red Blue Green (1963) of Ellsworth Kelly, his former partner. Indiana said, "Ellsworth Kelly introduced me to Hard-Edge and was a great influence on my work, and is responsible for my being here". The first serigraph/silk screen of LOVE was printed as part of an exhibition poster for Stable Gallery in 1966 on the occasion of Indiana’s show dedicated to his LOVE series . In 1973, the United States Postal Service commissioned a stamp design by Indiana and released the eight-cent LOVE stamp in advance of Valentine’s Day. Unveiled in a ceremony at the Philadelphia Museum of Art, the stamp became so popular that 425 million were printed over the next two years. Hebrew version In 1977, he created a Hebrew LOVE with the four-letter word Ahava (אהבה "love" in Hebrew) using Cor-Ten steel, for the Israel Museum Art Garden in Jerusalem. Variation for Google For Valentine's Day 2011, Google paid homage to Indiana’s LOVE, which was displayed in place of the search engine site's normal logo. Exhibitions In 1962, Eleanor Ward's Stable Gallery hosted Robert Indiana's first New York solo exhibition. Indiana’s work has been represented by Paul Kasmin Gallery in New York City, Waddington Custot in London and Galerie Gmurzynska in Europe. From July 4 – September 14, 2008, Indiana's work was the subject of the grand multiple-location exhibition Robert Indiana a Milano; the main exhibition took place at the Padiglione d’Arte Contemporanea (Pavilion of Contemporary Art), and other works were displayed in public piazzas in Milan. In 2013, the Whitney Museum of American Art mounted a retrospective of his work entitled Robert Indiana: Beyond LOVE, this exhibition traveled to the McNay Art Museum in San Antonio, Texas. The first retrospective of Indiana’s sculptures in the United Kingdom, spanning 60 years of the artist’s career, opened Yorkshire Sculpture Park on March 12, 2022 and runs through January 2023. Appearances of his work in popular culture Millions of television viewers saw an orange, brown, and white version of Five, one of Indiana's 1965 Numbers series, featured in an episode of The Mary Tyler Moore Show during the 1971–1972 season, in which Rhoda Morgenstern redecorates Lou Grant's dated