“I have no pet color. The whole spectrum is my favorite. No special color has an especial meaning. Green is generally considered a restful color, but green has a thousand qualities. It may be stirring rather than restful. Blues may mean one thing when applied to a square and another thing when applied to a circle. The key of C major has no special meaning but can be made to mean anything that one wishes to make it mean.”

—Thomas Wilfred (1889–1968), inventor of the Clavilux color organ, as quoted by Tom Douglas Jones in The Art of Light and Color, 1972.