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User Interface Wiki

Living wiki of UI design patterns and best practices built with Fumadocs, Next.js, and Base UI components.

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rules/visual-border-alpha-colors.md

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rules/visual-border-alpha-colors.md

1---
2title: Use Semi-Transparent Borders for Subtle Separation
3impact: MEDIUM
4tags: visual, border, alpha, separation
5---
6 
7## Use Semi-Transparent Borders for Subtle Separation
8 
9Semi-transparent borders adapt to any background color and create subtle, non-jarring separation.
10 
11**Incorrect (hardcoded border color):**
12 
13```css
14.card {
15  border: 1px solid #e5e5e5;
16}
17```
18 
19**Correct (alpha border):**
20 
21```css
22.card {
23  border: 1px solid var(--gray-a4);
24}
25```
26

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User Interface Wiki

rules/visual-border-alpha-colors.md