Art Nouveau sits in the centre of the value range, lending the palette a sense of even, sustained light. The palette tilts toward cool - blues and silver-greys carry the structural weight. Chroma hovers near zero; colour declares itself through subtle shifts in hue rather than outright saturation. #AB7752 functions as the palette's exclamation mark: highest chroma, lowest percentage (4.4%). Value range is moderate at 49 units - enough contrast for legibility, not so much as to fragment the tonal unity. High luminosity and cool temperature suggest the plein-air condition: unfiltered daylight and open sky.