Dark interfaces reduce visual noise and let content — particularly imagery, video, and colour accents — command attention. They create a sense of depth and sophistication, and when paired with considered typography and subtle gradients, feel elevated and luxurious.
Readability is the primary concern — pure white text on true black can cause halation, so slightly off-white text on dark grey is preferred. Establishing hierarchy with subtle tonal differences rather than colour alone requires careful attention to contrast ratios.