The value structure of Henry Herbert La Thangue is mid-key: quiet, controlled, and cohesive. Henry Herbert La Thangue builds on cool foundations: the palette favours the blue-cyan-green arc. The absence of saturated colour is itself an expressive choice: this is a palette of restraint and atmosphere. #AD6F40 functions as the palette's exclamation mark: highest chroma, lowest percentage (4.0%). The value range spans 57 units across the palette, providing the full gamut from deep shadow to near-white and ensuring clear tonal hierarchy. High luminosity and cool temperature suggest the plein-air condition: unfiltered daylight and open sky. These proportions encode Henry Herbert La Thangue's instinctive sense of how much of each quality the eye can hold.