The value structure of William Hart is mid-key: quiet, controlled, and cohesive. Yellow, ochre, sienna: warm hues that William Hart deploys as the palette's primary energy. Chroma is kept low across all colours, producing the soft, enveloping quality that characterises tonal painting. At 8.5%, #422211 carries the palette's sharpest chromatic charge: an accent that earns its place precisely because it is withheld. The value range spans 70 units across the palette, providing the full gamut from deep shadow to near-white and ensuring clear tonal hierarchy. In the context of William Hart's full range of palettes, group 4 represents one movement in an ongoing chromatic dialogue.