The painter's palette; a theory of tone relations, an instrument of expression (1919)
Ross, Denman Waldo, 1853-1935 · Boston and New York, Houghton Mifflin Co. · leaf 41
25 THE PAINTER’S PALETTE … Light which is hot (H) to the right and the left of it. Lines have been drawn; horizontal, vertical, and diagonal to indi- cate possible mixtures. The tones on horizontal lines are com- plementaries. Mixtures on horizontal lines produce neutrals. Mixtures on opposite verticals, having the same…
Color in art
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.