Mary Cassatt 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. Colours are neither washed out nor blazing; they occupy the productive middle ground of the chroma scale. The saturated accent, #CF855B, registers at 10.4% - sparse enough to feel like a deliberate surprise. A value spread of 56 units gives the palette both depth and air - shadows are genuinely dark, lights genuinely light. In the context of Mary Cassatt's full range of palettes, group 5 represents one movement in an ongoing chromatic dialogue.