The value structure of Jan van Os is mid-key: quiet, controlled, and cohesive. Temperature reads distinctly warm: the reds and earth tones from Jan van Os carry the compositional weight. The absence of saturated colour is itself an expressive choice: this is a palette of restraint and atmosphere. 36.8% of the palette belongs to #2C231E, a concentration that makes it the unmistakable visual centre. The highest-chroma note - #734B22 - appears at just 8.5%, deployed as a precision accent against the quieter ground. The value range spans 70 units across the palette, providing the full gamut from deep shadow to near-white and ensuring clear tonal hierarchy. Jan van Os's palette 4 carries its own internal logic while remaining in conversation with the artist's broader colour intelligence.