Working from the then-relatively new theory of complementary colors, the logical color to use was violet, being the complementary of yellow, the color of sunlight. Monet said: “Color owes its brightness to force of contrast rather than to its inherent qualities … primary colors look brightest when they are brought into contrast with their complementaries.” The Impressionists created violet by glazing cobalt blue or ultramarine with red, or by using new cobalt and manganese violet pigments that had become available to artists.
Monet painted his moody interiors of Saint-Lazare station, where the steam trains and glass roof created dramatic highlights and shadows, without earth pigments. He created his astoundingly rich array of browns and greys by combining new synthetic oil-paint colors (colors we today take for granted) such as cobalt blue, cerulean blue, synthetic ultramarine, emerald green, viridian, chrome yellow, vermilion, and crimson lake. He also used touches of lead white and a little ivory black. No shadow was considered as being without color, and the deepest shadows are tinged with green and purple.
Ogden Rood, the author of a book on color theory that greatly influenced the Impressionists, is reputed to have loathed their paintings, saying “If that is all I have done for art, I wish I had never written that book!” Well, I’m sure am glad he did.
