John Singleton Copley sits in the centre of the value range, lending the palette a sense of even, sustained light. Temperature reads distinctly warm: the reds and earth tones from John Singleton Copley carry the compositional weight. Muted throughout, the palette achieves its effects through value and temperature rather than chromatic force. A single dominant - #191617 at 41.9% - sets the character of the whole composition. #884C3D delivers the chromatic peak at only 2.5% - a small shot of colour with outsized visual impact. A value spread of 67 units gives the palette both depth and air - shadows are genuinely dark, lights genuinely light. Palette 4 sits within the larger chromatic argument that John Singleton Copley's complete body of work advances.