John Jackson sits in the centre of the value range, lending the palette a sense of even, sustained light. The dominant temperature is warm, with earth tones and fire-hues setting the emotional key. Chroma is kept low across all colours, producing the soft, enveloping quality that characterises tonal painting. A single dominant - #27211A at 25.0% - sets the character of the whole composition. #CC330E functions as the palette's exclamation mark: highest chroma, lowest percentage (1.3%). The full value range is 62 units: broad enough to build convincing three-dimensional form. The palette is recognisably John Jackson's own: particular in its temperature, chroma, and the economy of its brightest note.