Classic neon palettes pair electric cyan, magenta, and violet against near-black backgrounds. The key is high saturation and brightness in the accent colours, combined with generous glow effects through box-shadow and text-shadow to simulate the light bleed of physical neon tubes.
Balancing intense neon accents with large areas of dark, neutral space gives the eye relief. Using neon sparingly — for headlines, borders, and focal points rather than large filled areas — and slightly desaturating secondary elements helps maintain comfort during extended viewing.