> ## Documentation Index
> Fetch the complete documentation index at: https://docs.twenty.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Dark mode

> Load both Twenty UI palettes and switch the active color scheme.

Load both theme stylesheets when your application can switch schemes. `ThemeProvider` selects a palette by applying the `light` or `dark` class.

```tsx theme={null}
import { useState } from 'react';
import { Switch } from 'twenty-ui/input';
import { ThemeProvider } from 'twenty-ui/theme-constants';

import 'twenty-ui/style.css';
import 'twenty-ui/theme-light.css';
import 'twenty-ui/theme-dark.css';

export const App = () => {
  const [isDark, setIsDark] = useState(false);

  return (
    <ThemeProvider colorScheme={isDark ? 'dark' : 'light'}>
      <label>
        <Switch checked={isDark} onCheckedChange={setIsDark} />
        Dark mode
      </label>
    </ThemeProvider>
  );
};
```

The provider accepts an explicit scheme. Your application owns preference persistence and any system-preference handling. If you render on the server, use the same initial scheme on the server and client to avoid an initial palette mismatch.

## Mix palettes

Set `applyToRoot={false}` on a nested provider to give a subtree a different palette. Both stylesheets must be loaded:

```tsx theme={null}
import { ThemeProvider } from 'twenty-ui/theme-constants';

export const Preview = () => (
  <ThemeProvider colorScheme="light">
    <p>The application uses the light palette.</p>
    <ThemeProvider colorScheme="dark" applyToRoot={false}>
      <section
        style={{
          background: 'var(--t-background-primary)',
          color: 'var(--t-font-color-primary)',
        }}
      >
        This preview uses the dark palette.
      </section>
    </ThemeProvider>
  </ThemeProvider>
);
```

Use `useThemeColorScheme()` from `twenty-ui/theme-constants` to read the provider's active scheme. In a Twenty front component, use `useColorScheme()` from `twenty-sdk/front-component` to read the workspace scheme supplied by the host.