The value structure of Jock Macdonald is mid-key: quiet, controlled, and cohesive. Blues and teal-greys govern the palette, lending it an aquatic or atmospheric quality. Chroma hovers near zero; colour declares itself through subtle shifts in hue rather than outright saturation. The saturated accent, #A65542, registers at 2.4% - sparse enough to feel like a deliberate surprise. Value range is moderate at 52 units - enough contrast for legibility, not so much as to fragment the tonal unity. The mid-to-high key, cool bias, and moderate chroma point to outdoor observation - sky and diffused daylight as the dominant light source. This is palette 6 of Jock Macdonald's sequence - a single chapter in a chromatic story told across many works.