David Bailly is low-key throughout, a quality associated with Tenebrous Sienna - deep shadows dominate the composition. David Bailly tilts toward cool - blues and silver-greys carry the structural weight. Chroma is kept low across all colours, producing the soft, enveloping quality that characterises tonal painting. #4C3E26 delivers the chromatic peak at only 3.4% - a small shot of colour with outsized visual impact. At 58 units of value range, the palette has the tonal breadth to sustain complex spatial readings. The combination of low values, muted chroma, and compressed range is the signature of the Tonalist mode - painting as atmosphere. In the context of David Bailly's full range of palettes, group 4 represents one movement in an ongoing chromatic dialogue.