Colour theory from the ancient Greeks to Munsell, via several artists including Leonardo da Vinci and Phillip Otto Runge.
Ostwald
A brief look at the history of colour ordering, and colour systems, as an introduction to the pioneering work of Albert Henry Munsell.
It is evident that the rules of colour harmony vary widely and lack a solid basis. Opinions have changed often. (Rolf G Kuehni)
The Eclectic Light Company 