Robert D. Blue (1946-1998) was a painter, noted for his images of pin-up girls in the 1980s and later his cowgirls of the New West series. He was the son of comedic actor Ben Blue.

Blue was born in Los Angeles, and grew up in Beverly Hills. He served in the United States Army and attended the California College of Arts and Crafts, Oakland, earning a BFA at the Chouinard Art Institute in Los Angeles. Blue served as chairman of fine art at Assn. in Art, Van Nuys