Values in Henri Manguin rest in the mid-range - neither dramatically lit nor steeped in shadow. Henri Manguin builds on cool foundations: the palette favours the blue-cyan-green arc. All colours lean toward grey, building depth through value rather than colour punch. A single dominant - #999A8B at 27.2% - sets the character of the whole composition. #B7AF6C functions as the palette's exclamation mark: highest chroma, lowest percentage (8.7%). The palette spans 51 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. Henri Manguin's palette 1 carries its own internal logic while remaining in conversation with the artist's broader colour intelligence.