The high-key values of Art Nouveau give it an effulgent, almost bleached quality. Built on cool foundations: the palette favours the blue-cyan-green arc. Chroma is moderate: colours carry enough saturation to be read as colour, but the palette stops well short of garish intensity. #EAC485 at 32.0% of the palette: an overwhelming presence that pulls all other colours into its gravitational field. #C4A467 delivers the chromatic peak at only 11.3% - a small shot of colour with outsized visual impact. At 64 units of value range, the palette has the tonal breadth to sustain complex spatial readings. The mid-to-high key, cool bias, and moderate chroma point to outdoor observation - sky and diffused daylight as the dominant light source.