Gaston Vuillier is high-key - luminous, open, and weighted toward light. Cool hues prevail: blues, greens, and greys anchor the palette's emotional temperature. Chroma is kept low across all colours, producing the soft, enveloping quality that characterises tonal painting. #EBE9E0 at 39.1% of the palette: an overwhelming presence that pulls all other colours into its gravitational field. #B2852F delivers the chromatic peak at only 3.5% - a small shot of colour with outsized visual impact. A value spread of 59 units gives the palette both depth and air - shadows are genuinely dark, lights genuinely light. The palette has the character of outdoor light: cool, mid-bright, with colour rendered faithfully rather than expressively. Palette 1 sits within the larger chromatic argument that Gaston Vuillier's complete body of work advances.