The value structure of Theodor van Thulen is mid-key: quiet, controlled, and cohesive. Theodor van Thulen tilts toward cool - blues and silver-greys carry the structural weight. All colours lean toward grey, building depth through value rather than colour punch. Only 6.3% is devoted to #B76536, yet that small allocation delivers the palette's entire chromatic tension. 86 units of value range underpin the palette's structural clarity: the eye always knows where light falls. High luminosity and cool temperature suggest the plein-air condition: unfiltered daylight and open sky. In the context of Theodor van Thulen's full range of palettes, group 1 represents one movement in an ongoing chromatic dialogue.