Caravaggio invented the spotlight. Around 1600 in Rome, he plunged the canvas into a bottomless black ground and let one hard raking light from the upper corner pick out a hand, a face, a dirty sole of a foot — and nothing else. The aesthetic says: one slash of light against active darkness, and a peasant Madonna out-glows any gold-haloed Byzantine queen.

Translated to interface, tenebrism is restraint with religious weight. Vast warm-black fields. Content emerges from the dark like polished walnut. Crimson hairlines, ochre folds, lit-flesh cream type. The diagonal of the light is the layout grid; symmetry is forbidden.