Auguste Herbin is high in key: pale, luminous, and filled with optical air. 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. At 27.6%, #EAE5C7 functions less as a colour accent and more as a complete atmospheric environment. #5D6E17 functions as the palette's exclamation mark: highest chroma, lowest percentage (6.1%). Spanning 43 units on the value axis, the palette achieves the balance between tonal flatness and fragmentation. The palette has the character of outdoor light: cool, mid-bright, with colour rendered faithfully rather than expressively. Auguste Herbin's palette 1 carries its own internal logic while remaining in conversation with the artist's broader colour intelligence.