Joseph Ducreux keeps values measured and balanced, a hallmark of tonal restraint. Blues and teal-greys govern the palette, lending it an aquatic or atmospheric quality. Chroma hovers near zero; colour declares itself through subtle shifts in hue rather than outright saturation. A single dominant - #FEFEFD at 30.7% - sets the character of the whole composition. The saturated accent, #473324, registers at 8.0% - sparse enough to feel like a deliberate surprise. The full value range is 80 units: broad enough to build convincing three-dimensional form. The palette has the character of outdoor light: cool, mid-bright, with colour rendered faithfully rather than expressively. Joseph Ducreux's palette 4 carries its own internal logic while remaining in conversation with the artist's broader colour intelligence.