Willem Johan de Looper (1932–2009): A Pioneer of Color Field Painting Willem Johan de Looper (October 30, 1932 – January 30, 2009) stands as a significant figure in American Abstract Expressionism and the broader landscape of color field painting. Born in The Hague, Netherlands, his formative years were shaped by a Montessori education and profoundly impacted by the anxieties of World War II—a period marked by displacement and familia…