Mid-key values give Marie Duhem its characteristic quietness - nothing blazes, nothing disappears. Heat pervades this palette; warm chromatic identities outweigh cool ones at almost every weight. Chroma is kept low across all colours, producing the soft, enveloping quality that characterises tonal painting. The saturated accent, #664E35, registers at 11.3% - sparse enough to feel like a deliberate surprise. At 43 units across the value scale, the palette keeps contrast readable without letting it dominate. In the context of Marie Duhem's full range of palettes, group 5 represents one movement in an ongoing chromatic dialogue.