Jan Siberechts sits in the centre of the value range, lending the palette a sense of even, sustained light. Jan Siberechts 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. At 2.7%, #A73F39 carries the palette's sharpest chromatic charge: an accent that earns its place precisely because it is withheld. The full value range is 62 units: broad enough to build convincing three-dimensional form. This is palette 6 of Jan Siberechts's sequence - a single chapter in a chromatic story told across many works.