Art Nouveau distributes its values across the middle register, creating harmony without high contrast. Yellow, ochre, sienna: warm hues deployed as the palette's primary energy. Chroma is kept low across all colours, producing the soft, enveloping quality that characterises tonal painting. The highest-chroma note - #BB9E64 - appears at just 4.1%, deployed as a precision accent against the quieter ground. 76 units of value range underpin the palette's structural clarity: the eye always knows where light falls.