Middle yellow red (#ECB176) and Phthalo blue (#000F89) appear together across 3 master palettes in our corpus, most prominently in the work of Georges Lacombe, and Sonia Delaunay and the Symbolism tradition. Painters typically deployed middle yellow red at an average of 5% of the canvas, with phthalo blue at 14%. Third colors most often completing the combination include Chinese red (#AA381E), Outer space (#2D383A), and Bole (#79443B).