The value structure of Henri Martin is mid-key: quiet, controlled, and cohesive. A distinctly cool atmosphere runs through this palette: sky, water, and mist given colour form. The absence of saturated colour is itself an expressive choice: this is a palette of restraint and atmosphere. #7A8AAC functions as the palette's exclamation mark: highest chroma, lowest percentage (5.9%). At 43 units across the value scale, the palette keeps contrast readable without letting it dominate. High luminosity and cool temperature suggest the plein-air condition: unfiltered daylight and open sky. Henri Martin's palette 12 carries its own internal logic while remaining in conversation with the artist's broader colour intelligence.