Stitches is a fully-typed CSS-in-JS library featuring near-zero runtime, server-side rendering, multi-variant support, and a best-in-class developer experience.

Radix Colors is an accessible, open-source color system for designing gorgeous websites and apps. 28 colors scales with 12 steps in each scale. Dark mode support. Accessibility baked-in. Matching transparent variant for each scale.

Radix UI is a set of 26 unstyled React components for building high‑quality, accessible UI, design systems, and web apps.