Louis Vivin is high in key: pale, luminous, and filled with optical air. Louis Vivin builds on cool foundations: the palette favours the blue-cyan-green arc. Mid-range chroma keeps the palette grounded - colourful but not strident. Only 3.6% is devoted to #CB9628, yet that small allocation delivers the palette's entire chromatic tension. The value range spans 57 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. In the context of Louis Vivin's full range of palettes, group 4 represents one movement in an ongoing chromatic dialogue.