John Hayls sits in the centre of the value range, lending the palette a sense of even, sustained light. Cool hues prevail: blues, greens, and greys anchor the palette's emotional temperature. Chroma is kept low across all colours, producing the soft, enveloping quality that characterises tonal painting. #7B6142 functions as the palette's exclamation mark: highest chroma, lowest percentage (9.4%). From deepest dark to palest light, the palette traverses 77 units of the value scale - a span that creates natural depth. High luminosity and cool temperature suggest the plein-air condition: unfiltered daylight and open sky. The palette is a signature: John Hayls's particular sense of value, warmth, and colour weight made legible.