Bistre (#3D2B1F) and Charcoal (#36454F) appear together across 6 master palettes in our corpus, most prominently in the work of Onofrio Gabrieli, James Hamilton, and Christian Köhler and the Romanticism tradition. Painters typically deployed bistre at an average of 24% of the canvas, with charcoal at 12%. Third colors most often completing the combination include Eerie black (#1B1B1B), Khaki (#C3B091), and Umber (#635147).