Mannerism is low-key throughout, a quality associated with Tenebrous Sienna - deep shadows dominate the composition. Built on cool foundations: the palette favours the blue-cyan-green arc. Chroma hovers near zero; colour declares itself through subtle shifts in hue rather than outright saturation. #2B261F at 28.0% of the palette: an overwhelming presence that pulls all other colours into its gravitational field. The saturated accent, #C9AA79, registers at 2.2% - sparse enough to feel like a deliberate surprise. A value spread of 55 units gives the palette both depth and air - shadows are genuinely dark, lights genuinely light. This tonal restraint is characteristic of the Tonalist sensibility: colour serves light, not the reverse.