John Jackson distributes its values across the middle register, creating harmony without high contrast. Cool tones set the register here - the blues and greens easily outweigh any warm accents. Muted throughout, the palette achieves its effects through value and temperature rather than chromatic force. The saturated accent, #9B6B28, registers at 3.9% - sparse enough to feel like a deliberate surprise. The value range spans 83 units across the palette, providing the full gamut from deep shadow to near-white and ensuring clear tonal hierarchy. High luminosity and cool temperature suggest the plein-air condition: unfiltered daylight and open sky. John Jackson's palette 4 carries its own internal logic while remaining in conversation with the artist's broader colour intelligence.