Ruby red (#9B111E) and Space cadet (#1D2951) appear together across 2 master palettes in our corpus, most prominently in the work of Clovis Trouille and the Concretism tradition. Painters typically deployed ruby red at an average of 11% of the canvas, with space cadet at 24%. Third colors most often completing the combination include Raisin black (#242124), Persian red (#CC3333), and Windsor tan (#A75502).