Outsider art is high-key - luminous, open, and weighted toward light. Heat pervades this palette; warm chromatic identities outweigh cool ones at almost every weight. Colours are neither washed out nor blazing; they occupy the productive middle ground of the chroma scale. The saturated accent, #6C2119, registers at 7.0% - sparse enough to feel like a deliberate surprise. The full value range is 58 units: broad enough to build convincing three-dimensional form.