The value structure of Rosa Bonheur is mid-key: quiet, controlled, and cohesive. Cool hues prevail: blues, greens, and greys anchor the palette's emotional temperature. Every colour is desaturated; the palette proceeds through near-neutrals and gently-coloured greys. #705D3C functions as the palette's exclamation mark: highest chroma, lowest percentage (10.6%). At 40 units across the value scale, the palette keeps contrast readable without letting it dominate. The mid-to-high key, cool bias, and moderate chroma point to outdoor observation - sky and diffused daylight as the dominant light source. Rosa Bonheur's palette 12 carries its own internal logic while remaining in conversation with the artist's broader colour intelligence.