Gustave Boulanger is strongly light-biased - shadow is suggested rather than declared. Gustave Boulanger tilts toward cool - blues and silver-greys carry the structural weight. Saturation is measured and controlled, giving the palette presence without visual aggression. At 5.7%, #CD8A39 carries the palette's sharpest chromatic charge: an accent that earns its place precisely because it is withheld. The value range spans 73 units across the palette, providing the full gamut from deep shadow to near-white and ensuring clear tonal hierarchy. High luminosity and cool temperature suggest the plein-air condition: unfiltered daylight and open sky. This is palette 3 of Gustave Boulanger's sequence - a single chapter in a chromatic story told across many works.