The value structure of John Singleton Copley is mid-key: quiet, controlled, and cohesive. Warm hues command this palette; John Singleton Copley favours the reds, oranges, and yellows of firelight and earth. Every colour is desaturated; the palette proceeds through near-neutrals and gently-coloured greys. #1C1919 claims 32.1% of the surface, functioning as the work's tonal foundation. Only 1.4% is devoted to #273878, yet that small allocation delivers the palette's entire chromatic tension. From deepest dark to palest light, the palette traverses 65 units of the value scale - a span that creates natural depth. Taken together, these qualities constitute John Singleton Copley's chromatic voice - distinctive enough to be read across an entire body of work.