The value structure of Abstract Expressionism is mid-key: quiet, controlled, and cohesive. Blues and teal-greys govern the palette, lending it an aquatic or atmospheric quality. Chroma is held at a comfortable level - distinct colours, but no single hue is allowed to overwhelm. Rather than a studied accent, #163A9F takes 31.7% - a bold allocation that saturates the composition's atmosphere. At 70 units of value range, the palette has the tonal breadth to sustain complex spatial readings. The mid-to-high key, cool bias, and moderate chroma point to outdoor observation - sky and diffused daylight as the dominant light source.