The value structure of Pierre Jean Edmond Castan is mid-key: quiet, controlled, and cohesive. Warmth dominates - the palette of Pierre Jean Edmond Castan leans heavily on the yellow-orange-red arc of the colour wheel. Every colour is desaturated; the palette proceeds through near-neutrals and gently-coloured greys. Only 6.6% is devoted to #835232, yet that small allocation delivers the palette's entire chromatic tension. 69 units of value range underpin the palette's structural clarity: the eye always knows where light falls. The palette is a signature: Pierre Jean Edmond Castan's particular sense of value, warmth, and colour weight made legible.