Léon-Victor Dupré 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. The absence of saturated colour is itself an expressive choice: this is a palette of restraint and atmosphere. #A27B3D functions as the palette's exclamation mark: highest chroma, lowest percentage (7.7%). From deepest dark to palest light, the palette traverses 66 units of the value scale - a span that creates natural depth. The mid-to-high key, cool bias, and moderate chroma point to outdoor observation - sky and diffused daylight as the dominant light source. Palette 4 sits within the larger chromatic argument that Léon-Victor Dupré's complete body of work advances.