Gustave Loiseau is high in key: pale, luminous, and filled with optical air. Gustave Loiseau tilts toward cool - blues and silver-greys carry the structural weight. The absence of saturated colour is itself an expressive choice: this is a palette of restraint and atmosphere. #EBE7BF at 48.9% of the palette: an overwhelming presence that pulls all other colours into its gravitational field. #524C2E functions as the palette's exclamation mark: highest chroma, lowest percentage (6.1%). At 66 units of value range, the palette has the tonal breadth to sustain complex spatial readings. High luminosity and cool temperature suggest the plein-air condition: unfiltered daylight and open sky. Gustave Loiseau's palette 18 carries its own internal logic while remaining in conversation with the artist's broader colour intelligence.