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Dev tools · April 21, 2026

Nightfall CSS

Your next theme reverse-engineered

What it does

Nightfall scans your live UI, detects light or dark mode, builds a color relationship graph, and generates the opposite theme — in OKLCH color space, with WCAG contrast enforcement and your brand colors preserved. Not filter: invert(). Not a color swap. Real theme generation.

Does the same job

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