Bistre (#3D2B1F) and Flax (#EEDC82) appear together across 6 master palettes in our corpus, most prominently in the work of Rembrandt Peale, Wilhelm von Kaulbach, and Raimundo de Madrazo and the Neoclassicism tradition. Painters typically deployed bistre at an average of 24% of the canvas, with flax at 8%. Third colors most often completing the combination include Metallic Sunburst (#9C7C38), Coyote brown (#81613C), and Smoky black (#100C08).