Bistre (#3D2B1F) and Silver sand (#BFC1C2) appear together across 6 master palettes in our corpus, most prominently in the work of Carl Rungius, Emile Louis Picault, and Jean-Adrien Guignet and the Naturalism tradition. Painters typically deployed bistre at an average of 26% of the canvas, with silver sand at 15%. Third colors most often completing the combination include Eerie black (#1B1B1B), Khaki (#C3B091), and Van Dyke brown (#664228).