The value structure of Andrea del Verrocchio is mid-key: quiet, controlled, and cohesive. Warm and cool are kept in productive tension, creating the kind of chromatic harmony that sustains the eye. Saturation is deliberately withheld - the beauty here lies in the near-monochromatic gradations rather than colour difference. The saturated accent, #B97E34, registers at 8.2% - sparse enough to feel like a deliberate surprise. The full value range is 56 units: broad enough to build convincing three-dimensional form. These proportions encode Andrea del Verrocchio's instinctive sense of how much of each quality the eye can hold.