Marcel Duchamp distributes its values across the middle register, creating harmony without high contrast. Warm and cool are kept in productive tension, creating the kind of chromatic harmony that sustains the eye. Saturation is deliberately withheld - the beauty here lies in the near-monochromatic gradations rather than colour difference. Only 10.8% is devoted to #80724C, yet that small allocation delivers the palette's entire chromatic tension. 56 units of value range underpin the palette's structural clarity: the eye always knows where light falls. Marcel Duchamp's palette 4 carries its own internal logic while remaining in conversation with the artist's broader colour intelligence.