The Outsider art tradition carries a consistent chromatic signature, and this master palette captures its essence. The value structure of Outsider art is mid-key: quiet, controlled, and cohesive. Blues and teal-greys govern the palette, lending it an aquatic or atmospheric quality. Chroma is held at a comfortable level - distinct colours, but no single hue is allowed to overwhelm. The saturated accent, #C3B176, registers at 11.1% - sparse enough to feel like a deliberate surprise. The value range of 53 units sits in the comfortable middle: enough depth, enough light, neither extreme. High luminosity and cool temperature suggest the plein-air condition: unfiltered daylight and open sky. Applied to contemporary work, these proportions immediately evoke the Outsider art register.