Making Mud
Color mixing can be tricky; mixing mud is what we try to avoid. There is a place, however, for that muddy color. Neutral grays well placed can enhance the pure spot of color you want accented. Eugene Delacroix was a master at using 'mud' for the surrounding areas to the more pure mixtures. He really made the skin tones almost glow. Degas and his use of grays surrounding pure color.