John Singleton Copley occupies the comfortable middle of the value scale, avoiding both extremes to hold the eye in a sustained middle grey. Warm hues command this palette; John Singleton Copley favours the reds, oranges, and yellows of firelight and earth. Chroma hovers near zero; colour declares itself through subtle shifts in hue rather than outright saturation. The highest-chroma note - #D78671 - appears at just 4.4%, deployed as a precision accent against the quieter ground. 66 units of value range underpin the palette's structural clarity: the eye always knows where light falls. In the context of John Singleton Copley's full range of palettes, group 13 represents one movement in an ongoing chromatic dialogue.