Kobicha (#6B4423) and Smoky black (#100C08) appear together across 6 master palettes in our corpus, most prominently in the work of Jacques-Louis David, Cristofano dell'Altissimo, and Diego Velazquez and the Early Renaissance tradition. Painters typically deployed kobicha at an average of 30% of the canvas, with smoky black at 12%. Third colors most often completing the combination include Bistre (#3D2B1F), Zinnwaldite brown (#2C1608), and Khaki (#C3B091).