tailwind-design-system

Tailwind v4 introduces CSS-first theming where you define semantic design tokens using @theme blocks and OKLCH colors, replacing the JavaScript configuration approach used in Tailwind v3 for more consistent and perceptually uniform results.

You implement dark mode in Tailwind CSS v4 using the @custom-variant pattern to define theme variants. This standardizes dark and light themes across multiple teams while maintaining accessible focus rings and robust UX.

You build a React 19 component library by composing components with CVA variants and compound component patterns. This method pairs with Tailwind CSS v4 semantic tokens to create reusable UI libraries for a product suite.

You define semantic design tokens inside an @theme block using perceptually uniform OKLCH color tokens. This CSS-first theming approach ensures consistent styling and eliminates inconsistent styling across your application.

Tailwind CSS v4 supports native CSS animations using @keyframes and @starting-style properties. This allows you to implement robust UX animations directly in your CSS without heavy JavaScript dependencies.

You can use CVA component variants with Tailwind CSS v4 to compose scalable component libraries. This pattern works with React 19 component structures to define responsive grids and form patterns.