Low-key values are the structural spine of Sebastien Bourdon, giving it gravity and atmosphere. Warm hues command this palette; Sebastien Bourdon favours the reds, oranges, and yellows of firelight and earth. The absence of saturated colour is itself an expressive choice: this is a palette of restraint and atmosphere. Sebastien Bourdon gives 28.1% of the composition to a single #1E1B13 - a decisive chromatic anchor. Only 7.1% is devoted to #543A24, yet that small allocation delivers the palette's entire chromatic tension. From deepest dark to palest light, the palette traverses 70 units of the value scale - a span that creates natural depth. The combination of low values, muted chroma, and compressed range is the signature of the Tonalist mode - painting as atmosphere. In the context of Sebastien Bourdon's full range of palettes, group 6 represents one movement in an ongoing chromatic dialogue.