After the war, he returned to Paris but, like his friend Elihu Vedder, he settled finally in Italy, purchasing a villa in Capri.

Coleman painted in a variety of styles and media. A portraitist and figure painter, he painted a portrait of well-known Buffalo painter, Lars Sellstedt. His participation in the international Aesthetic Movement produced many still lifes with a highly oriental flavor. His best known works, however, are probably his later architectural landscapes. Coleman died in Capri in 1928.

Coleman’s work is in the collections of many of the world’s finest museums, including the Albright-Knox Museum (Buffalo), the Detroit Institute, the Metropolitan Museum, the Minneapolis Institute, the Brooklyn Museum, the Whitney Museum, and the Museum of Fine Arts, Boston.