Jan de Baen is low-key throughout, a quality associated with Obsidian Sienna - deep shadows dominate the composition. 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. 47.0% of the palette belongs to #171610, a concentration that makes it the unmistakable visual centre. At 0.9%, #53301B carries the palette's sharpest chromatic charge: an accent that earns its place precisely because it is withheld. The value range of 52 units sits in the comfortable middle: enough depth, enough light, neither extreme. The combination of low values, muted chroma, and compressed range is the signature of the Tonalist mode - painting as atmosphere. Jan de Baen's palette 1 carries its own internal logic while remaining in conversation with the artist's broader colour intelligence.