Gustave Moreau distributes its values across the middle register, creating harmony without high contrast. Cool tones set the register here - the blues and greens easily outweigh any warm accents. Chroma hovers near zero; colour declares itself through subtle shifts in hue rather than outright saturation. Only 7.0% is devoted to #684B39, yet that small allocation delivers the palette's entire chromatic tension. Value range is moderate at 50 units - enough contrast for legibility, not so much as to fragment the tonal unity. High luminosity and cool temperature suggest the plein-air condition: unfiltered daylight and open sky. Gustave Moreau's palette 9 carries its own internal logic while remaining in conversation with the artist's broader colour intelligence.