Prosper Baccuet occupies the comfortable middle of the value scale, avoiding both extremes to hold the eye in a sustained middle grey. Temperature is cool-dominant, with blue and green families claiming the largest areas. Chroma is kept low across all colours, producing the soft, enveloping quality that characterises tonal painting. The saturated accent, #FBF7BF, registers at 3.3% - sparse enough to feel like a deliberate surprise. The full value range is 75 units: broad enough to build convincing three-dimensional form. The mid-to-high key, cool bias, and moderate chroma point to outdoor observation - sky and diffused daylight as the dominant light source. Taken together, these qualities constitute Prosper Baccuet's chromatic voice - distinctive enough to be read across an entire body of work.