The value structure of Isaac de Moucheron is mid-key: quiet, controlled, and cohesive. Isaac de Moucheron keeps warm and cool in parity, a balance that lends the work a perceptual shimmer. Saturation is deliberately withheld - the beauty here lies in the near-monochromatic gradations rather than colour difference. #B58D5D delivers the chromatic peak at only 4.0% - a small shot of colour with outsized visual impact. A value spread of 61 units gives the palette both depth and air - shadows are genuinely dark, lights genuinely light. This is palette 4 of Isaac de Moucheron's sequence - a single chapter in a chromatic story told across many works.