Rosa Bonheur sits in the centre of the value range, lending the palette a sense of even, sustained light. Rosa Bonheur builds on cool foundations: the palette favours the blue-cyan-green arc. Chroma hovers near zero; colour declares itself through subtle shifts in hue rather than outright saturation. The saturated accent, #755B31, registers at 8.6% - sparse enough to feel like a deliberate surprise. The value range spans 67 units across the palette, providing the full gamut from deep shadow to near-white and ensuring clear tonal hierarchy. 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 Rosa Bonheur's full range of palettes, group 9 represents one movement in an ongoing chromatic dialogue.