De Stijl is a Dutch art movement named after the magazine De Stijl, founded in Leiden in 1917. The main members of De Stijl were Theo van Doesburg, Piet Mondrian, Vilmos Huszár, Bart van der Leck, J.J.P. Oud, Jan Wils, Robert van 't Hoff, Gerrit Rietveld and Georges Vantongerloo. De Stijl was primarily a project of artist and publicist Theo van Doesburg, the self-proclaimed founder, editor and propagandist of De Stijl. Members of De Stijl sought a radical reform of art that kept pace with technical, scientific and social changes in the world. This reform included the use of a minimum of colors (primary colors, combined with black, white and gray) and the simplest possible design (preferably following the orthogonal system). Although the magazine De Stijl never sold more than 300 copies, it had a great influence on art in the Netherlands and abroad. Beginning in the 1930s, De Stijl was credited with a central role in the European avant-garde.