Louis Marcoussis distributes its values across the middle register, creating harmony without high contrast. A distinctly cool atmosphere runs through this palette: sky, water, and mist given colour form. Saturation is deliberately withheld - the beauty here lies in the near-monochromatic gradations rather than colour difference. #403B5E functions as the palette's exclamation mark: highest chroma, lowest percentage (2.5%). 76 units of value range underpin the palette's structural clarity: the eye always knows where light falls. The palette has the character of outdoor light: cool, mid-bright, with colour rendered faithfully rather than expressively. Louis Marcoussis's palette 4 carries its own internal logic while remaining in conversation with the artist's broader colour intelligence.