Piet Mondrian is high in key: pale, luminous, and filled with optical air. Heat pervades this palette; warm chromatic identities outweigh cool ones at almost every weight. Chroma is held at a comfortable level - distinct colours, but no single hue is allowed to overwhelm. The chromatic peak belongs to #EB493A, and at 35.4% it dominates, not decorates. A value spread of 59 units gives the palette both depth and air - shadows are genuinely dark, lights genuinely light. Palette 1 sits within the larger chromatic argument that Piet Mondrian's complete body of work advances.