Marcel Duchamp is high-key - luminous, open, and weighted toward light. Marcel Duchamp builds on cool foundations: the palette favours the blue-cyan-green arc. All colours lean toward grey, building depth through value rather than colour punch. Only 8.5% is devoted to #CCAC69, yet that small allocation delivers the palette's entire chromatic tension. The value range spans 59 units across the palette, providing the full gamut from deep shadow to near-white and ensuring clear tonal hierarchy. High luminosity and cool temperature suggest the plein-air condition: unfiltered daylight and open sky. Marcel Duchamp's palette 1 carries its own internal logic while remaining in conversation with the artist's broader colour intelligence.