Art Nouveau is strongly light-biased - shadow is suggested rather than declared. The palette balances warm and cool with remarkable evenness, giving the composition its characteristic vibrancy. Every colour is desaturated; the palette proceeds through near-neutrals and gently-coloured greys. #CAB99E functions as the palette's exclamation mark: highest chroma, lowest percentage (11.2%). At 63 units of value range, the palette has the tonal breadth to sustain complex spatial readings.