Purity to modulation

Scriabin held that each mode corresponded to a particular shade of colour, and each modulation to a nuance of this shade. Changes from the major into the minor could therefore be underlined by strong contrasts, on a visual as well as a chromatic level. This was one of the most important aspects of Scriabin’s research into new areas of expression.

Frank Popper, Origins and Development of Kinetic Art, 1968, 157-8.