Robert Paul Hess, a longtime pigment industry figure, died Feb. 1, 2009. He was 57.      Mr. Hess, who had worked with Magruder Color, Radiant Color and Day-Glo during his career, was always known as a friendly, fun man who could make people laugh.      “We are all sad to lose a good friend,” said Darren Bianchi, president of Brilliant Color, who worked with Mr. Hess at Radiant Color for 15 years. “All who knew him have numerous stories to tell. Bob was quick-witted and could light up a room...