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A11y Contrast Badge

Check in the browser whether the theme palette meets AA before opening the PR.

Full screen Try a theme

Choose the primitives library your project already uses. Both look the same: your theme, not the variant, controls colors, shape, type and motion.

About this block

What it's for

  • Check in the browser whether the theme palette meets AA before opening the PR.
  • Fail the CI build when someone darkens a token and breaks secondary text contrast.
  • Audit a brand theme against AAA without changing the application code.

Includes

  • Wcag contrast ratio
  • Oklch color parsing
  • Lab color parsing
  • Token sheet audit
  • Live computed style audit
  • Theme reactive remeasure
  • Build time gate
  • Marginal pass detection

Works with

  • Radix UI and Base UI primitives (pick the one your project uses)
  • React 19, Next.js App Router and Tailwind CSS 4, installed with the shadcn CLI
  • Your theme tokens, in light and dark mode

Install

Included with Agentic UI Kit (one-time license). Install needs your license key: see pricing · connect your project.

Agentic UI CLI
agentic-ui add a11y-contrast-badge
Installs through shadcn and adapts the component to your design tokens.
shadcn CLI
npx shadcn@4.17.0 add @agentic-ui/a11y-contrast-badge

Used in

A standalone component: drop it into any screen.

Type
Block
Variants
Radix UI and Base UI
Themes
Light and dark
Widths
Preview it at desktop, tablet and mobile widths above.