Theme UI screenshot

Theme UI

Author Avatar Theme by System ui
Updated: 14 Feb 2025
5348 Stars

Build consistent, themeable React apps based on constraint-based design principles

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Overview

The theme-ui package is a powerful tool for building custom user interfaces. It provides a set of utility functions and components that make it easy to create consistent and aesthetically pleasing designs. With theme-ui, you can define your own design system and customize every aspect of your UI, including colors, typography, layout, and more. This package is highly flexible and can be used with React and other popular JavaScript frameworks.

Features

  • Customizable Design System: Define your own design system with theme-ui and easily customize the look and feel of your UI.
  • Utility Functions: Theme-ui provides a variety of utility functions that make it easy to apply styles, scale typography, and handle responsive design.
  • CSS-in-JS: With theme-ui, you can write your CSS styles directly in your JavaScript code using the Emotion CSS-in-JS library.
  • Component Library: Theme-ui includes a collection of reusable UI components that you can use out of the box or customize to fit your needs.

Installation

To install the theme-ui package, you can use npm or yarn. First, make sure you have either npm or yarn installed on your machine. Then, run the following command in your project directory:

npm install theme-ui

or

yarn add theme-ui

Once the installation is complete, you can import the theme-ui components and start using them in your project. Here is an example of how to import the Button component:

import { Button } from 'theme-ui';

const App = () => {
  return (
    <Button variant="primary">
      Click me
    </Button>
  );
};

export default App;

Make sure to also import the CSS styles for the theme-ui components in your project.

Summary

The theme-ui package is a powerful tool for building custom user interfaces. It provides a customizable design system, utility functions for styling, and a collection of reusable UI components. With theme-ui, you can easily create aesthetically pleasing and consistent designs. Installation is straightforward, and you can start using theme-ui components in your project right away.