The value structure of Paul Cezanne is mid-key: quiet, controlled, and cohesive. Temperature is cool-dominant, with blue and green families claiming the largest areas. The absence of saturated colour is itself an expressive choice: this is a palette of restraint and atmosphere. The highest-chroma note - #9F7E57 - appears at just 4.8%, deployed as a precision accent against the quieter ground. The full value range is 60 units: broad enough to build convincing three-dimensional form. 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 the light Paul Cezanne preferred, made measurable.