The value structure of Tonalism is mid-key: quiet, controlled, and cohesive. Built on cool foundations: the palette favours the blue-cyan-green arc. Every colour is desaturated; the palette proceeds through near-neutrals and gently-coloured greys. Only 7.0% is devoted to #8A6938, yet that small allocation delivers the palette's entire chromatic tension. Value range is moderate at 39 units - enough contrast for legibility, not so much as to fragment the tonal unity. The palette has the character of outdoor light: cool, mid-bright, with colour rendered faithfully rather than expressively.