Emile Galle is low-key throughout, a quality associated with Nocturnal Sienna - deep shadows dominate the composition. Heat pervades this palette; warm chromatic identities outweigh cool ones at almost every weight. Every colour is desaturated; the palette proceeds through near-neutrals and gently-coloured greys. 35.9% of the palette belongs to #191717, a concentration that makes it the unmistakable visual centre. Only 1.9% is devoted to #B39845, yet that small allocation delivers the palette's entire chromatic tension. The full value range is 73 units: broad enough to build convincing three-dimensional form. The combination of low values, muted chroma, and compressed range is the signature of the Tonalist mode - painting as atmosphere. In the context of Emile Galle's full range of palettes, group 5 represents one movement in an ongoing chromatic dialogue.