Frederick J. Brown, an American artist who explored the relationship between music and painting in portraits of hundreds of jazz and blues artists, died on May 5 at his home in Scottsdale, Ariz. He was 67. …Brown occasionally painted in the abstract mode, but he was largely a figurative painter unafraid of grand projects—large-scale canvases, murals, extended series. He was known for placing his subjects, often African-Americans rendered in muted tones, against backgrounds of intense color.