The value structure of Henri Martin is mid-key: quiet, controlled, and cohesive. Henri Martin 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. #BDB897 functions as the palette's exclamation mark: highest chroma, lowest percentage (5.8%). 43 units of value spread create a palette that is varied but unified - contrast in the service of harmony. The mid-to-high key, cool bias, and moderate chroma point to outdoor observation - sky and diffused daylight as the dominant light source. This is palette 19 of Henri Martin's sequence - a single chapter in a chromatic story told across many works.