The value structure of Pietro Perugino is mid-key: quiet, controlled, and cohesive. A distinctly cool atmosphere runs through this palette: sky, water, and mist given colour form. Chroma is kept low across all colours, producing the soft, enveloping quality that characterises tonal painting. At 5.9%, #9C4F28 carries the palette's sharpest chromatic charge: an accent that earns its place precisely because it is withheld. At 64 units of value range, the palette has the tonal breadth to sustain complex spatial readings. High luminosity and cool temperature suggest the plein-air condition: unfiltered daylight and open sky. Palette 9 sits within the larger chromatic argument that Pietro Perugino's complete body of work advances.