The value structure of self-portrait is mid-key: quiet, controlled, and cohesive. Yellow, ochre, sienna: warm hues deployed as the palette's primary energy. Every colour is desaturated; the palette proceeds through near-neutrals and gently-coloured greys. #3F2312 delivers the chromatic peak at only 8.4% - a small shot of colour with outsized visual impact. The full value range is 72 units: broad enough to build convincing three-dimensional form.