The value structure of John Atkinson Grimshaw is mid-key: quiet, controlled, and cohesive. Warm hues command this palette; John Atkinson Grimshaw favours the reds, oranges, and yellows of firelight and earth. Chroma is kept low across all colours, producing the soft, enveloping quality that characterises tonal painting. The highest-chroma note - #948E3F - appears at just 2.3%, deployed as a precision accent against the quieter ground. At 54 units across the value scale, the palette keeps contrast readable without letting it dominate. John Atkinson Grimshaw's palette 12 carries its own internal logic while remaining in conversation with the artist's broader colour intelligence.