The value structure of Rolf Amstrong is mid-key: quiet, controlled, and cohesive. Cool tones set the register here - the blues and greens easily outweigh any warm accents. A restrained, mid-chroma palette: every hue is present and legible, but nothing shouts. #563817 functions as the palette's exclamation mark: highest chroma, lowest percentage (10.0%). The full value range is 70 units: broad enough to build convincing three-dimensional form. The palette has the character of outdoor light: cool, mid-bright, with colour rendered faithfully rather than expressively. The palette is recognisably Rolf Amstrong's own: particular in its temperature, chroma, and the economy of its brightest note.