The value structure of Piero della Francesca is mid-key: quiet, controlled, and cohesive. The dominant temperature is warm, with earth tones and fire-hues setting the emotional key. Saturation is deliberately withheld - the beauty here lies in the near-monochromatic gradations rather than colour difference. The saturated accent, #7D4F41, registers at 5.8% - sparse enough to feel like a deliberate surprise. At 56 units of value range, the palette has the tonal breadth to sustain complex spatial readings. In the context of Piero della Francesca's full range of palettes, group 3 represents one movement in an ongoing chromatic dialogue.