Platinum (#E5E4E2) and Sinopia (#CB410B) appear together across 4 master palettes in our corpus, most prominently in the work of Nathan Altman and the Cubism tradition. Painters typically deployed platinum at an average of 8% of the canvas, with sinopia at 13%. Third colors most often completing the combination include Moss green (#8A9A5B), Mandarin (#F37A48), and Dark olive green (#556B2F).