Mid-key values give John Singleton Copley its characteristic quietness - nothing blazes, nothing disappears. John Singleton Copley builds on cool foundations: the palette favours the blue-cyan-green arc. Saturation is deliberately withheld - the beauty here lies in the near-monochromatic gradations rather than colour difference. The most saturated colour, #C69F7D, is reserved to 9.3% of the surface, where it acts as a focal punctuation. 65 units of value range underpin the palette's structural clarity: the eye always knows where light falls. The mid-to-high key, cool bias, and moderate chroma point to outdoor observation - sky and diffused daylight as the dominant light source. In the context of John Singleton Copley's full range of palettes, group 9 represents one movement in an ongoing chromatic dialogue.