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link-in-text-block

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Use when applies to hyperlinks (`<a>` elements) that appear inline within paragraphs or text blocks. Does not apply to navigation menus, button-style links, or standalone links that are visually isolated from body text. Use when reviewing CSS that removes text-decoration from inline body copy links.

skills/link-in-text-block/SKILL.md

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Oct 31, 2026
License
MIT

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# Make links in text blocks visually distinguishable

Approximately 8% of men and 0.5% of women have color vision deficiency (red-green being most common). If links are distinguished only by a color like blue or red, these users may not identify them as links and miss critical navigation or reference information. The underline is a universal, color-independent signal understood across cultures and vision abilities. Removing underlines is a common design trend that disproportionately affects users with low vision and cognitive disabilities.

## Quick Reference

- Color must not be the only visual means of distinguishing links from surrounding text — WCAG 2.1 SC 1.4.1 (Use of Color)
- Option 1: Underline links (the browser default and most robust approach)
- Option 2: If no underline, the link color must have ≥ 3:1 contrast ratio against surrounding body text AND ≥ 4.5:1 against the background
- Focus and hover states must also maintain distinguishability
- Applies only to links embedded within paragraphs/text blocks; standalone navigation links have different requirements

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