Low-key values are the structural spine of Tenebrism, giving it gravity and atmosphere. The palette tilts toward cool - blues and silver-greys carry the structural weight. Saturation is deliberately withheld - the beauty here lies in the near-monochromatic gradations rather than colour difference. #16151F at 31.3% of the palette: an overwhelming presence that pulls all other colours into its gravitational field. The most saturated colour, #775036, is reserved to 2.0% of the surface, where it acts as a focal punctuation. The palette spans 53 value units: a measured range that delivers coherence over drama. Together these qualities place the palette firmly in the tonal tradition - concerned with mood and atmosphere rather than chromatic display.