Olyx UI – React component library with native CSS and full ownership

Summary: Olyx UI is a React component library built on Base UI primitives offering 50+ accessible components with native CSS and a predictable HCT color system. It provides full ownership by allowing copy-paste of every file without runtime overhead or black-box updates.

What it does

It delivers accessible, composable React components using native CSS and a theming system based on HCT colors, enabling developers to own and customize every file directly.

Who it's for

Developers seeking a React UI library without lock-in, runtime overhead, or black-box updates, who want full control over their components.

Why it matters

It solves issues with UI library lock-in and unpredictable theming by providing a fully owned, accessible, and performant component set.