Jean-Baptiste Regnault occupies the comfortable middle of the value scale, avoiding both extremes to hold the eye in a sustained middle grey. A distinctly cool atmosphere runs through this palette: sky, water, and mist given colour form. Every colour is desaturated; the palette proceeds through near-neutrals and gently-coloured greys. #AB8F3D functions as the palette's exclamation mark: highest chroma, lowest percentage (3.2%). The palette spans 49 value units: a measured range that delivers coherence over drama. High luminosity and cool temperature suggest the plein-air condition: unfiltered daylight and open sky. Palette 4 sits within the larger chromatic argument that Jean-Baptiste Regnault's complete body of work advances.