The value structure of Nicolas Toussaint Charlet is mid-key: quiet, controlled, and cohesive. Cool hues prevail: blues, greens, and greys anchor the palette's emotional temperature. Chroma hovers near zero; colour declares itself through subtle shifts in hue rather than outright saturation. The most saturated colour, #A06E3E, is reserved to 3.4% of the surface, where it acts as a focal punctuation. Value range is moderate at 46 units - enough contrast for legibility, not so much as to fragment the tonal unity. The mid-to-high key, cool bias, and moderate chroma point to outdoor observation - sky and diffused daylight as the dominant light source. This is palette 4 of Nicolas Toussaint Charlet's sequence - a single chapter in a chromatic story told across many works.