My choice of colors does not rest on any scientific theory; it is based on observation, on feeling, on the experience of my sensibility. Inspired by certain pages of Delacroix, an artist like Signac is preoccupied with complementary colors, and the theoretical knowledge of them will lead him to use a certain tone in a certain place. But I simply try to put down colors which render my sensation.
Henri MatisseAn artist who wants to transpose a composition onto a larger canvas must conceive it over again in order to preserve its expression; he must alter its character and not just fill in the squares into which he has divided his canvas.
Henri Matisse