The value structure of Jean Lecomte du Nouÿ is mid-key: quiet, controlled, and cohesive. Jean Lecomte du Nouÿ tilts toward cool - blues and silver-greys carry the structural weight. The absence of saturated colour is itself an expressive choice: this is a palette of restraint and atmosphere. At 25.7%, #191815 functions less as a colour accent and more as a complete atmospheric environment. The saturated accent, #76200C, registers at 3.7% - sparse enough to feel like a deliberate surprise. 62 units of value range underpin the palette's structural clarity: the eye always knows where light falls. High luminosity and cool temperature suggest the plein-air condition: unfiltered daylight and open sky. Palette 4 sits within the larger chromatic argument that Jean Lecomte du Nouÿ's complete body of work advances.