Bone (#E3DAC9) and Opal (#A8C3BC) appear together across 6 master palettes in our corpus, most prominently in the work of Lev Lagorio, Vytautas Kairiukstis, and Wilhelm Bendz and the Romanticism tradition. Painters typically deployed bone at an average of 31% of the canvas, with opal at 18%. Third colors most often completing the combination include Khaki (#C3B091), Shadow (#8A795D), and Laurel green (#A9BA9D).