The value structure of Gustave Loiseau is mid-key: quiet, controlled, and cohesive. Gustave Loiseau tilts toward cool - blues and silver-greys carry the structural weight. Chroma hovers near zero; colour declares itself through subtle shifts in hue rather than outright saturation. Only 4.9% is devoted to #4E5028, yet that small allocation delivers the palette's entire chromatic tension. Spanning 52 units on the value axis, the palette achieves the balance between tonal flatness and fragmentation. The mid-to-high key, cool bias, and moderate chroma point to outdoor observation - sky and diffused daylight as the dominant light source. In the context of Gustave Loiseau's full range of palettes, group 9 represents one movement in an ongoing chromatic dialogue.