Claude Deruet distributes its values across the middle register, creating harmony without high contrast. Claude Deruet builds on cool foundations: the palette favours the blue-cyan-green arc. Chroma is kept low across all colours, producing the soft, enveloping quality that characterises tonal painting. The saturated accent, #A5622F, registers at 2.8% - sparse enough to feel like a deliberate surprise. The full value range is 63 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. This is palette 1 of Claude Deruet's sequence - a single chapter in a chromatic story told across many works.