Low-key values are the structural spine of Jan Steen, giving it gravity and atmosphere. Jan Steen orchestrates warmth above all else - reds, ambers, and siennas take the lead. Chroma hovers near zero; colour declares itself through subtle shifts in hue rather than outright saturation. #140C07 at 25.8% of the palette: an overwhelming presence that pulls all other colours into its gravitational field. Only 4.4% is devoted to #B6793F, yet that small allocation delivers the palette's entire chromatic tension. The full value range is 66 units: broad enough to build convincing three-dimensional form. The combination of low values, muted chroma, and compressed range is the signature of the Tonalist mode - painting as atmosphere. In the context of Jan Steen's full range of palettes, group 13 represents one movement in an ongoing chromatic dialogue.