As basic rules of a language must be practiced continually, and therefore are never fixed, so exercises toward distinct color effects never are done or over. New and different cases will be discovered time and again.
Josef AlbersSimultaneous contrast is not just a curious optical phenomenon โ it is the very heart of painting. Repeated experiments with adjacent colors will show that any ground subtracts its own hue from the colors which it carries and therefore influences.
Josef Albers