Clifford, C. R. (Chandler Robbins), 1858-1935 · New York : Clifford & Lawton · leaf 10
Definitions. Primary colors are blue, red and yellow. Secondary colors are orange, green and violet, each a combination of two primaries. Tertiary colors are colors made by combining two secondary colors ; tertiary colors are slate, rus- set and citrine. Quaternary colors are made by combining two…
Color
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
