Mid-key values give Marie Duhem its characteristic quietness - nothing blazes, nothing disappears. Marie Duhem tilts toward cool - blues and silver-greys carry the structural weight. Chroma hovers near zero; colour declares itself through subtle shifts in hue rather than outright saturation. The saturated accent, #D7AE66, registers at 5.3% - sparse enough to feel like a deliberate surprise. At 42 units across the value scale, the palette keeps contrast readable without letting it dominate. High luminosity and cool temperature suggest the plein-air condition: unfiltered daylight and open sky. This is palette 3 of Marie Duhem's sequence - a single chapter in a chromatic story told across many works.