Copper (#B87333) and Rufous (#A81C07) appear together across 6 master palettes in our corpus, most prominently in the work of Eugeniusz Zak, Stefan Luchian, and William Dobson and the Baroque tradition. Painters typically deployed copper at an average of 31% of the canvas, with rufous at 6%. Third colors most often completing the combination include Russet (#80461B), Smoky black (#100C08), and Gold Fusion (#85754E).