React fix guide
Fix Low color contrast on React
Text that blends into the background is hard to read for people with low vision and in bright sunlight.
This page ties the generic issue to how it usually shows up in React markup and tooling, then walks you through a fix and verification loop.
Verify on a live URL
Scan, fix, deploy, then rescan the same address to compare reports.
Main issue guide: Low color contrast →
At a glance
Instructional
Body text sample
Fails WCAG AA for normal text
Body text sample
Stronger contrast
Thin fonts and imagery behind text make effective contrast worse in practice, especially on phones.
Where this comes from on React
Tailwind opacity utilities, theme tokens, and inline styles on shared Button components.
What this issue means
What this issue is
Automated tools compare foreground and background colors to thresholds (often 4.5:1 for normal text under WCAG AA). Thin fonts and images behind text complicate measurement.
Why it matters
Contrast affects readability for many users, not only those with diagnosed vision disabilities. Marketing palettes sometimes prioritize brand over legibility.
Fixes
Darken text, lighten background, or add a solid backdrop behind text on busy images. Re-check hover and disabled states.
How to fix on React
Tailwind opacity utilities reduce contrast; verify computed colors.
How to fix
Increase contrast to at least 4.5:1 for normal text (AA). Test hover, disabled, and error states.
Add a solid scrim behind text on photos instead of relying on busy backgrounds.
Code snippet
<p className="text-slate-900">Body copy with sufficient contrast on white background</p>
Common mistakes on React
- Opacity helpers (`text-white/70`) that fail ratios.
- Dark mode tokens not updated.
- Fixing Storybook but not production props.
- Conditional roles that differ between tests and prod.
How to verify the fix
- Run `npm run build && npm start` and test the production bundle.
- Tab through the component; check the accessibility tree in devtools.
- Rerun the scan on the deployed or staging URL.
Related: 1.4.3 Contrast (Minimum).
Same issue on other platforms
Related issues
Guides
Next steps
- Run a scan on staging or production.
- Re-read the main issue page for context and WCAG notes.
- React and Next.js accessibility hub for more platform resources.
TestAccessibility · React fix · localhost:3001