Fuseli.
COLOUR
CXL
He who desires to be a painter must learn to rule the black, and red, and white.
Titian.
CXLI
There is the black which is old and the black which is fresh, lustrous black and dull black, black in sunlight and black in shadow. For the old black, one must use an admixture of red; for the fresh black, an admixture of blue; for the dull black, an admixture of white; for lustrous black, gum must be added; black in sunlight must have grey reflections.