Light floods Henri Le Sidaner; the palette keeps values pale and airy across its range. Temperature is cool-dominant, with blue and green families claiming the largest areas. Every colour is desaturated; the palette proceeds through near-neutrals and gently-coloured greys. Henri Le Sidaner gives 30.5% of the composition to a single #E2E4EA - a decisive chromatic anchor. The most saturated colour, #1B291F, is reserved to 0.9% of the surface, where it acts as a focal punctuation. The value range spans 66 units across the palette, providing the full gamut from deep shadow to near-white and ensuring clear tonal hierarchy. The palette has the character of outdoor light: cool, mid-bright, with colour rendered faithfully rather than expressively. In the context of Henri Le Sidaner's full range of palettes, group 1 represents one movement in an ongoing chromatic dialogue.