Joos van Cleve is low-key throughout, a quality associated with Nocturnal Sienna - deep shadows dominate the composition. Temperature is balanced: the palette pits warm earth against cool sky without declaring a winner. Saturation is deliberately withheld - the beauty here lies in the near-monochromatic gradations rather than colour difference. At 31.9%, #0D0D09 functions less as a colour accent and more as a complete atmospheric environment. The saturated accent, #4E2B1C, registers at 6.2% - sparse enough to feel like a deliberate surprise. The full value range is 60 units: broad enough to build convincing three-dimensional form. The combination of low values, muted chroma, and compressed range is the signature of the Tonalist mode - painting as atmosphere. This is palette 5 of Joos van Cleve's sequence - a single chapter in a chromatic story told across many works.