The value structure of Jacob de Heusch is mid-key: quiet, controlled, and cohesive. A distinctly cool atmosphere runs through this palette: sky, water, and mist given colour form. Chroma hovers near zero; colour declares itself through subtle shifts in hue rather than outright saturation. Only 10.0% is devoted to #CB984A, yet that small allocation delivers the palette's entire chromatic tension. The full value range is 81 units: broad enough to build convincing three-dimensional form. High luminosity and cool temperature suggest the plein-air condition: unfiltered daylight and open sky. These proportions encode Jacob de Heusch's instinctive sense of how much of each quality the eye can hold.