Color problems; a practical manual for the lay student of color (1903)
Vanderpoel, Emily Noyes, 1842-1939 · New York [etc.] Longmans, Green · leaf 355
Plate XCVIII … COLOR ANALYSIS FROM A BUTTERFLY Dark Yellow Shade 80 Medium Yellow 25 Light Yellow . 20 Silver 15 Black 10 100 The black was well placed to contrast with the light tones» the silver to contrast with the dark tone.
Internet Archive · Smithsonian Libraries · Public domain (published before 1931). Free to use for anything.
