Darkness anchors John Riley; light is rationed, creating dramatic contrast rather than open air. Yellow, ochre, sienna: warm hues that John Riley deploys as the palette's primary energy. Chroma is kept low across all colours, producing the soft, enveloping quality that characterises tonal painting. At 8.1%, #4E290C carries the palette's sharpest chromatic charge: an accent that earns its place precisely because it is withheld. Value range is moderate at 52 units - enough contrast for legibility, not so much as to fragment the tonal unity. The combination of low values, muted chroma, and compressed range is the signature of the Tonalist mode - painting as atmosphere. In the context of John Riley's full range of palettes, group 10 represents one movement in an ongoing chromatic dialogue.