Gregorio Undurraga distributes its values across the middle register, creating harmony without high contrast. Neither warm nor cool has the upper hand here; the equilibrium between the two generates the palette's visual energy. Chroma hovers near zero; colour declares itself through subtle shifts in hue rather than outright saturation. #644C3E functions as the palette's exclamation mark: highest chroma, lowest percentage (5.9%). At 42 units across the value scale, the palette keeps contrast readable without letting it dominate. This is palette 7 of Gregorio Undurraga's sequence - a single chapter in a chromatic story told across many works.