'Itten wrote in 1916: 'Form is also color. Without color there is no form. Form and color are one.’ It never occurred to me to make a three dimensional work without color. I took Itten’s premise, which I had not read, for granted...Color is like material. It is one way or another, but it obdurately exists. Its existence as it is the main fact and not what it might mean, which may be nothing... No immediate feeling can be attributed to color. Nothing can be identified. If it seems otherwise, usually the association is cultural, for example, the light blue and white, supposedly the colors of peace, of the cops and the United Nations. If there were an identifiable feeling to red or to red and black together they would not be useable to me... Color , like material, is what art is made from. It alone is not art. Itten confused the components for the whole. Other than the spectrum, there is no pure color' (D. Judd, 'Some Aspects of Color in General and Red and Black in Particular’ 1993, in D. Elger (ed.), Donald Judd: Colorist, exh. cat., Ostfildern-Ruit 2000, pp. 110-14).