Design tips and standards for elevating AI frontend UI taste

Drawing on the insights of top designers, this guide helps you avoid cheap or tacky AI-generated interfaces by standardizing details like border radiuses, colors, typography, and borders. Effectively leveraging ready-made component libraries and prompts significantly enhances the UI quality in Vibe Coding.

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Added 2026-10-31 · originally published 2026-10-30

Key points

Use a superellipse to achieve continuous iOS-style corner rounding.
Streamline borders to 0.5px, limit font sizes to 4 or fewer, and use Radix Colors consistently.
Avoid a cheap look caused by too many colors; stick to black, white, and gray, reserving color for content.
Audit against the AI slop checklist to avoid the three overused fonts, purple gradients, all-caps subheadings, and 1px heavy borders.
When handling Chinese web typography, use a font-family setup with Western fonts first, Chinese fonts second, and sans-serif as the fallback.
During Vibe Coding, have the AI directly use common UI components and component libraries to raise the baseline quality.

Pitfalls

Using too many colors, making the interface look cheap
Using the three overused fonts
Overusing purple gradients
Using all-caps subheadings
Using 1px heavy borders
Font issues when AI generates Chinese web pages

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- Use 0.5px for borders
- Strictly limit font sizes to 4 or fewer
- Use Radix Colors consistently, favoring black, white, and gray
- Set font-family with Western fonts first, Chinese fonts second, and sans-serif as the fallback
- Avoid purple gradients, all-caps subheadings, and 1px heavy borders

Copy-ready prompt

Please optimize the frontend UI for [Page/Component Name]: Use 0.5px for border thickness, keep the number of font sizes to 4 or fewer, and use Radix Colors consistently. Rely mostly on black, white, and gray for backgrounds and base colors, reserving color strictly for core content. For border radiuses, use a superellipse to achieve continuous iOS-style corner rounding. Font stacks must list Western fonts first, followed by Chinese fonts, with sans-serif as the final fallback. Avoid purple gradients, all-caps subheadings, and overused fonts.

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#AI Frontend Polish#UI Design#Vibe Coding#Pitfall Avoidance

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Beautifying AI-Generated Frontends and Avoiding Common Pitfalls

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Key points

Pitfalls

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