The value structure of Jean-Baptiste Robie is mid-key: quiet, controlled, and cohesive. Jean-Baptiste Robie builds on cool foundations: the palette favours the blue-cyan-green arc. All colours lean toward grey, building depth through value rather than colour punch. #6D3525 functions as the palette's exclamation mark: highest chroma, lowest percentage (5.9%). At 52 units across the value scale, the palette keeps contrast readable without letting it dominate. The palette has the character of outdoor light: cool, mid-bright, with colour rendered faithfully rather than expressively. Palette 4 sits within the larger chromatic argument that Jean-Baptiste Robie's complete body of work advances.