Values in John Hoppner rest in the mid-range - neither dramatically lit nor steeped in shadow. John Hoppner tilts toward cool - blues and silver-greys carry the structural weight. Every colour is desaturated; the palette proceeds through near-neutrals and gently-coloured greys. The dominant colour, #2E281F, takes 25.1% of the total area, establishing the overall mood before any other hue is introduced. The highest-chroma note - #4E321F - appears at just 6.2%, deployed as a precision accent against the quieter ground. A value spread of 58 units gives the palette both depth and air - shadows are genuinely dark, lights genuinely light. The mid-to-high key, cool bias, and moderate chroma point to outdoor observation - sky and diffused daylight as the dominant light source. Palette 4 sits within the larger chromatic argument that John Hoppner's complete body of work advances.