Light floods Achille Devéria; the palette keeps values pale and airy across its range. Achille Devéria builds on cool foundations: the palette favours the blue-cyan-green arc. Saturation is measured and controlled, giving the palette presence without visual aggression. Achille Devéria gives 46.6% of the composition to a single #F7D798 - a decisive chromatic anchor. The highest-chroma note - #B89326 - appears at just 5.0%, deployed as a precision accent against the quieter ground. 52 units of value spread create a palette that is varied but unified - contrast in the service of harmony. High luminosity and cool temperature suggest the plein-air condition: unfiltered daylight and open sky. In the context of Achille Devéria's full range of palettes, group 1 represents one movement in an ongoing chromatic dialogue.