radix-ui-design-system

Accessible React components are built using Radix headless primitives, which provide WCAG-compliant keyboard and focus handling while allowing you to inject any styling system via the `asChild` prop. This approach replaces opinionated defaults with full styling control.

Theming a Radix UI design system is best achieved by combining CSS variables, Tailwind with CVA, or Stitches. This allows you to define custom theme variables and compose compound components while maintaining full control over the visual output.

Yes, Radix primitives integrate seamlessly with Tailwind and shadcn/ui. You can use the `asChild` prop to inject Tailwind classes and leverage shadcn/ui for rapid collaboration when assembling production-grade UI components like dialogs and dropdowns.

Radix UI handles WCAG 2.1 AA/AAA compliance by baking keyboard navigation, focus management, and ARIA guidance directly into each primitive. This ensures accessible behavior is preserved without requiring manual accessibility implementation.

You should replace an opinionated component library with headless primitives when your team needs production-grade accessibility but requires full styling control. This is ideal for designing custom component libraries and compound patterns without fighting built-in CSS constraints.