Guillaume Seignac 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. The most saturated colour, #604A33, is reserved to 8.3% of the surface, where it acts as a focal punctuation. The full value range is 59 units: broad enough to build convincing three-dimensional form. The palette has the character of outdoor light: cool, mid-bright, with colour rendered faithfully rather than expressively. This is palette 1 of Guillaume Seignac's sequence - a single chapter in a chromatic story told across many works.