Bistre (#3D2B1F) and Gunmetal (#2a3439) appear together across 6 master palettes in our corpus, most prominently in the work of Mihaly Szemler, Gustav Wentzel, and James Hamilton and the Romanticism tradition. Painters typically deployed bistre at an average of 25% of the canvas, with gunmetal at 12%. Third colors most often completing the combination include Smoky black (#100C08), Khaki (#C3B091), and Umber (#635147).