The value structure of Jock Macdonald is mid-key: quiet, controlled, and cohesive. Cool hues prevail: blues, greens, and greys anchor the palette's emotional temperature. Chroma hovers near zero; colour declares itself through subtle shifts in hue rather than outright saturation. #BCAD5C functions as the palette's exclamation mark: highest chroma, lowest percentage (10.0%). The full value range is 60 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. This is the light Jock Macdonald preferred, made measurable.