Claude Deruet is low-key throughout, a quality associated with Tenebrous Sienna - deep shadows dominate the composition. Blues and teal-greys govern the palette, lending it an aquatic or atmospheric quality. Saturation is deliberately withheld - the beauty here lies in the near-monochromatic gradations rather than colour difference. The dominant colour, #191915, takes 34.4% of the total area, establishing the overall mood before any other hue is introduced. #483C21 delivers the chromatic peak at only 4.7% - a small shot of colour with outsized visual impact. At 42 units across the value scale, the palette keeps contrast readable without letting it dominate. The combination of low values, muted chroma, and compressed range is the signature of the Tonalist mode - painting as atmosphere. This is palette 4 of Claude Deruet's sequence - a single chapter in a chromatic story told across many works.