Maurice most usually thought of color in how it related to value. ( The relative lightness or darkness of a color.) Always making sure that a composition worked in black and white FIRST before moving on into something more colorful.
Cartoon Colour cel vinyl was Maurice's paint of choice. The paints were marked with a one (1) for the lightest value, and the bigger the number, the darker the paint.
Above is a chart Maurice used to show how the value of many colors he used related to gray.
GRAY SCALE SHOWING CORRESPONDING COLOR VALUES
The color number appears vertically under each color and #20 represents the darkest value. The gray values on the left are in the same order, from dark to light, and any color number appearing on a horizontal line with a gray value has that same gray value when photographed in black and white.
How is this useful? It's sometimes difficult to tell how dark or light a color really is. When transferring a black and white sketch Maurice wanted to be sure that his colors were as close as possible to the original sketch values.
Supplement to pg. 91 of "The Noble Approach."
Clean up by Esben Sloth