The value structure of Joseph Highmore is mid-key: quiet, controlled, and cohesive. Neither warm nor cool has the upper hand here; the equilibrium between the two generates the palette's visual energy. Chroma is kept low across all colours, producing the soft, enveloping quality that characterises tonal painting. The most saturated colour, #846B21, is reserved to 6.7% of the surface, where it acts as a focal punctuation. A value spread of 58 units gives the palette both depth and air - shadows are genuinely dark, lights genuinely light. This is the light Joseph Highmore preferred, made measurable.