Rich black (#010203) and Zinnwaldite brown (#2C1608) appear together across 6 master palettes in our corpus, most prominently in the work of Francesco Ribalta, Jacques Amans, and Jan Miense Molenaer and the Baroque tradition. Painters typically deployed rich black at an average of 45% of the canvas, with zinnwaldite brown at 22%. Third colors most often completing the combination include Café noir (#4B3621), Kobicha (#6B4423), and Dark sienna (#3C1414).