Hans Hofmann was an American-German Abstract Expressionist painter regarded as one of the most influential art teachers of the 20th century. In works such as The Golden Wall (1961), Hofmann disbelieve his belief in the emotional potential of color. “Color is a plastic means of creating intervals—color harmonics produced by special relationships, or tensions,” he once remarked. Born on March 21, 1880 in Weissenberg, Germany, his family moved to Munich, where as a precocious teenager Hofmann produced scientific inventions, including a radar device. Working for the Bavarian government as young man, he moved to Paris in 1904 to pursue a career in art. In 1915, he opened his own art school in Munich, which operated until 1...