Mid-key values give Henri Matisse its characteristic quietness - nothing blazes, nothing disappears. Henri Matisse tilts toward cool - blues and silver-greys carry the structural weight. Every colour is desaturated; the palette proceeds through near-neutrals and gently-coloured greys. Only 4.7% is devoted to #A64B3F, yet that small allocation delivers the palette's entire chromatic tension. The full value range is 63 units: broad enough to build convincing three-dimensional form. The mid-to-high key, cool bias, and moderate chroma point to outdoor observation - sky and diffused daylight as the dominant light source. Henri Matisse's palette 27 carries its own internal logic while remaining in conversation with the artist's broader colour intelligence.