Shadow (#8A795D) and Slate gray (#708090) appear together across 6 master palettes in our corpus, most prominently in the work of Enrico Nardi, Robert Lewis Reid, and Arthur Beecher Carles and the Divisionism tradition. Painters typically deployed shadow at an average of 14% of the canvas, with slate gray at 12%. Third colors most often completing the combination include Khaki (#C3B091), Raisin black (#242124), and Bone (#E3DAC9).