Art Nouveau painters returned to these tonal relationships repeatedly; this palette is their shared chromatic grammar. Art Nouveau keeps values measured and balanced, a hallmark of tonal restraint. The palette balances warm and cool with remarkable evenness, giving the composition its characteristic vibrancy. Chroma is kept low across all colours, producing the soft, enveloping quality that characterises tonal painting. #9C5A3E functions as the palette's exclamation mark: highest chroma, lowest percentage (6.5%). The full value range is 69 units: broad enough to build convincing three-dimensional form. Any work aspiring to the Art Nouveau sensibility would find reliable footing in these values.