The value structure of Henri Martin is mid-key: quiet, controlled, and cohesive. Blues and teal-greys govern the palette, lending it an aquatic or atmospheric quality. Chroma is kept low across all colours, producing the soft, enveloping quality that characterises tonal painting. #9D5139 functions as the palette's exclamation mark: highest chroma, lowest percentage (2.9%). Value range is moderate at 47 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. Palette 17 sits within the larger chromatic argument that Henri Martin's complete body of work advances.