Skip to main content
UI Guides

Search rules

Search all UI Guides rules by name, category, or source

designVercel

Hue Consistency

SHOULD

SHOULD: Hue consistency: tint borders/shadows/text toward bg hue

Tint borders, shadows, and text toward background hue

Bad

Good

Why it matters

Pure black borders and shadows look harsh on colored backgrounds. Slightly tint them toward the background color for a more cohesive, refined appearance. For example, on a blue background, use slightly blue-tinted shadows instead of pure gray.

References

Built by Gleb Stroganov, design engineer at Evil Martians.

The rules come from other people's skills and guidelines — Vercel, Rauno Freiberg, @Ibelick, impeccable, Emil Kowalski, Tailwind, RAMS — each one credited on the Sources page. The work here is extraction and wiring: every rule is pulled into one corpus, given a good and a bad example you can operate, a MUST/SHOULD/NEVER rule an agent can paste, and a link back to where it came from.