Just as orange is red brought nearer to humanity by yellow, so violet is red withdrawn from humanity by blue. But the red in violet must be cold, for the spiritual need does not allow of a mixture of warm red with cold blue. Violett is therefore both in the physical and spiritual sense a cooled red. It is consequently rather sad and ailing. It is worn by old women, and in China as a sign of mourning. In music it is an English horn, or the deep notes of wood instruments (e.g. a bassoon).
V. Kandinsky, Concerning the spiritual in art, Dover Publ. New York 1977, translated by M.T.H. Sadler