Maurice often combined cool shadows with warm light. (...as well as warm shadows with cool light.) He would push these contrasts depending on the needs of the story at hand. For example, a more dramatic moment, or a more satirical story would get a more "pushed" treatment.
Above: Here are a few random examples from some of Maurice's film work showing how he combined light and shadow.
Supplement to pg. 100 of "The Noble Approach"