A color notation
A color notation is a 1919 New York book by the colour theorist A. H. Munsell, published by the Munsell Color Company as a systematic reference on colour for artists and students. Its single plate, Chart 50, shows Middle Color Scales as a black oval field of numbered swatches arranged in rings, red at the top grading through orange, yellow, green and blue; a designer could borrow its orderly stepped palette logic for colour systems and swatch grids.
