Henri Matisse distributes its values across the middle register, creating harmony without high contrast. A distinctly cool atmosphere runs through this palette: sky, water, and mist given colour form. Chroma is kept low across all colours, producing the soft, enveloping quality that characterises tonal painting. #864F3E functions as the palette's exclamation mark: highest chroma, lowest percentage (4.7%). 61 units of value range underpin the palette's structural clarity: the eye always knows where light falls. 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 15 carries its own internal logic while remaining in conversation with the artist's broader colour intelligence.