Prussian blue (#003153) and Zinnwaldite brown (#2C1608) appear together across 6 master palettes in our corpus, most prominently in the work of Carl Marcus Tuscher, Francesco Stringa, and Giovanni Bellini and the Rococo tradition. Painters typically deployed prussian blue at an average of 16% of the canvas, with zinnwaldite brown at 7%. Third colors most often completing the combination include Smoky black (#100C08), Café noir (#4B3621), and Khaki (#C3B091).