The value structure of Gustave de Smet is mid-key: quiet, controlled, and cohesive. Temperature is cool-dominant, with blue and green families claiming the largest areas. Saturation is measured and controlled, giving the palette presence without visual aggression. The saturated accent, #E6D8B3, registers at 7.5% - sparse enough to feel like a deliberate surprise. The value range spans 55 units across the palette, providing the full gamut from deep shadow to near-white and ensuring clear tonal hierarchy. The mid-to-high key, cool bias, and moderate chroma point to outdoor observation - sky and diffused daylight as the dominant light source. Palette 3 sits within the larger chromatic argument that Gustave de Smet's complete body of work advances.