Zacharie-Felix Doumet is high in key: pale, luminous, and filled with optical air. Zacharie-Felix Doumet builds on cool foundations: the palette favours the blue-cyan-green arc. Chroma is kept low across all colours, producing the soft, enveloping quality that characterises tonal painting. #C1CDD1 claims 31.2% of the surface, functioning as the work's tonal foundation. The saturated accent, #DAC1B5, registers at 6.8% - sparse enough to feel like a deliberate surprise. Value range is moderate at 33 units - enough contrast for legibility, not so much as to fragment the tonal unity. High luminosity and cool temperature suggest the plein-air condition: unfiltered daylight and open sky. Zacharie-Felix Doumet's palette 1 carries its own internal logic while remaining in conversation with the artist's broader colour intelligence.