Azure (#F0FFFF) and Bistre (#3D2B1F) appear together across 5 master palettes in our corpus, most prominently in the work of Camille Corot, Gustave Courbet, and James Ward and the Realism tradition. Painters typically deployed azure at an average of 10% of the canvas, with bistre at 10%. Third colors most often completing the combination include Smoky black (#100C08), Coffee (#6F4E37), and Drab dark brown (#4A412A).