The value structure of Jean-François Portaels is mid-key: quiet, controlled, and cohesive. Neither warm nor cool has the upper hand here; the equilibrium between the two generates the palette's visual energy. All colours lean toward grey, building depth through value rather than colour punch. #8E683A functions as the palette's exclamation mark: highest chroma, lowest percentage (6.2%). At 42 units across the value scale, the palette keeps contrast readable without letting it dominate. In the context of Jean-François Portaels's full range of palettes, group 9 represents one movement in an ongoing chromatic dialogue.