Mid-key values give Jan van Os its characteristic quietness - nothing blazes, nothing disappears. Temperature is cool-dominant, with blue and green families claiming the largest areas. All colours lean toward grey, building depth through value rather than colour punch. At 2.4%, #87381C carries the palette's sharpest chromatic charge: an accent that earns its place precisely because it is withheld. At 63 units of value range, the palette has the tonal breadth to sustain complex spatial readings. High luminosity and cool temperature suggest the plein-air condition: unfiltered daylight and open sky. The palette is a signature: Jan van Os's particular sense of value, warmth, and colour weight made legible.