Oxblood (#4A0000) and Rich black (#010203) appear together across 6 master palettes in our corpus, most prominently in the work of John Singleton Copley, and Paul-Albert Besnard and the Neoclassicism tradition. Painters typically deployed oxblood at an average of 4% of the canvas, with rich black at 12%. Third colors most often completing the combination include Bone (#E3DAC9), Zinnwaldite brown (#2C1608), and Magnolia (#F2E8D7).