The value structure of Gaston Vuillier is mid-key: quiet, controlled, and cohesive. Gaston Vuillier orchestrates warmth above all else - reds, ambers, and siennas take the lead. Every colour is desaturated; the palette proceeds through near-neutrals and gently-coloured greys. The most saturated colour, #805652, is reserved to 11.4% of the surface, where it acts as a focal punctuation. The value range of 51 units sits in the comfortable middle: enough depth, enough light, neither extreme. This is palette 3 of Gaston Vuillier's sequence - a single chapter in a chromatic story told across many works.