“The only possible rival to sound as a vehicle of pure emotion is color. . . . Here I will express my conviction that a color-art exactly analogous to the sound-art of music is possible and is amongst the arts which have to be traversed in the future, as sculpture, architecture, paintings, and music have been in the past.”

—H.R. Haweis, in 1875, as quoted by Tom Douglas Jones in The Art of Light and Color, 1972.