Prussian blue (#003153) and Smoky black (#100C08) appear together across 6 master palettes in our corpus, most prominently in the work of Carl Marcus Tuscher, Rafael Tegeo, and Henri Lehmann and the Rococo tradition. Painters typically deployed prussian blue at an average of 26% of the canvas, with smoky black at 6%. Third colors most often completing the combination include Zinnwaldite brown (#2C1608), Beaver (#9F8170), and Khaki (#C3B091).