The value structure of Armand Guillaumin is mid-key: quiet, controlled, and cohesive. Warm and cool tones are held in careful balance - neither family dominates, creating tension and resolution simultaneously. Saturation is deliberately withheld - the beauty here lies in the near-monochromatic gradations rather than colour difference. #623137 functions as the palette's exclamation mark: highest chroma, lowest percentage (5.3%). From deepest dark to palest light, the palette traverses 71 units of the value scale - a span that creates natural depth. This is palette 7 of Armand Guillaumin's sequence - a single chapter in a chromatic story told across many works.