supabase/apps/reference/docs/guides/auth/auth-helpers/auth-ui.mdx

---
id: auth-ui
title: Auth UI
description: A prebuilt, customizable React component for authenticating users.
---

Auth UI is a pre-built React component for authenticating users.
It supports custom themes and extensible styles to match your brand and aesthetic.

<video width="99%" muted playsInline controls="true">
  <source
    src="https://supabase.com/images/blog/lw5-one-more/auth-ui-demo.mp4"
    type="video/mp4"
    muted
    playsInline
  />
</video>

## Set up Auth UI

Install the latest version of [supabase-js](/docs/reference/javascript/next/) and the Auth UI package:

```bash
npm install @supabase/supabase-js@rc @supabase/auth-ui-react
```

### Import the Auth component

Pass `supabaseClient` from `@supabase/supabase-js` as a prop to the component.

```js title="/src/index.js"
import { createClient } from '@supabase/supabase-js'
import { Auth } from '@supabase/auth-ui-react'

const supabase = createClient(
  '<INSERT PROJECT URL>',
  '<INSERT PROJECT ANON API KEY>'
)

const App = () => <Auth supabaseClient={supabase} />
```

This renders the Auth component without any styling.
We recommend using one of the predefined themes to style the UI.
Import the theme you want to use and pass it to the `appearence.theme` prop.

```diff js title="/src/index.js"
import {
    Auth,
    // highlight-next-line
    ThemeSupa
} from '@supabase/auth-ui-react'

const App = () => (
    <Auth
        supabaseClient={supabase}
        // highlight-next-line
        appearance={{ theme: ThemeSupa }}
    />
)
```

## Customization

There are several ways to customize Auth UI:

- Use one of the [predefined themes](#predefined-themes) that comes with Auth UI
- Extend a theme by [overriding the variable tokens](#override-themes) in a theme
- [Create your own theme](#create-theme)
- [Use your own CSS classes](#custom-css-classes)
- [Use inline styles](#custom-inline-styles)
- [Use your own labels](#custom-labels)

### Predefined themes

Auth UI comes with several themes to customize the appearance. Each predefined theme comes with at least two variations, a `default` variation, and a `dark` variation. You can switch between these themes using the `theme` prop. Import the theme you want to use and pass it to the `appearence.theme` prop.

```js title="/src/index.js"
import { createClient } from '@supabase/supabase-js'
//highlight-next-line
import { Auth, ThemeSupa } from '@supabase/auth-ui-react'

const supabase = createClient(
  '<INSERT PROJECT URL>',
  '<INSERT PROJECT ANON API KEY>'
)

const App = () => (
  <Auth
    supabaseClient={supabase}
    // highlight-next-line
    appearance={{ theme: ThemeSupa }}
  />
)
```

:::info
Currently there is only one predefined theme available, but we plan to add more.
:::

### Switch theme variations

Auth UI comes with two theme variations: `default` and `dark`. You can switch between these themes with the `theme` prop.

```js title="/src/index.js"
import { createClient } from '@supabase/supabase-js'
import { Auth, ThemeSupa } from '@supabase/auth-ui-react'

const supabase = createClient(
  '<INSERT PROJECT URL>',
  '<INSERT PROJECT ANON API KEY>'
)

const App = () => (
  <Auth
    supabaseClient={supabase}
    appearance={{ theme: ThemeSupa }}
    // highlight-next-line
    theme="dark"
  />
)
```

If you don't pass a value to `theme` it uses the `"default"` theme. You can pass `"dark"` to the theme prop to switch to the `dark` theme. If your theme has other variations, use the name of the variation in this prop.

### Override themes

Auth UI themes can be overridden using variable tokens. See the [list of variable tokens](https://github.com/supabase-community/auth-ui/blob/main/packages/react/common/theming/Themes.tsx).

```js title="/src/index.js"
import { createClient } from '@supabase/supabase-js'
import { Auth, ThemeSupa } from '@supabase/auth-ui-react'

const supabase = createClient(
  '<INSERT PROJECT URL>',
  '<INSERT PROJECT ANON API KEY>'
)

const App = () => (
  <Auth
    supabaseClient={supabase}
    appearance={{
      theme: ThemeSupa,
      // highlight-start
      variables: {
        default: {
          colors: {
            brand: 'red',
            brandAccent: 'darkred',
          },
        },
      },
      // highlight-end
    }}
  />
)
```

If you created your own theme, you may not need to override any of the them.

### Create your own theme {#create-theme}

You can create your own theme by following the same structure within a `appearance.theme` property.
See the list of [tokens within a theme](https://github.com/supabase-community/auth-ui/blob/main/packages/react/common/theming/Themes.tsx).

```js title="/src/index.js"
import { createClient } from '@supabase/supabase-js'
import { Auth } from '@supabase/auth-ui-react'

const supabase = createClient(
  '<INSERT PROJECT URL>',
  '<INSERT PROJECT ANON API KEY>'
)

const customTheme = {
  default: {
    colors: {
      brand: 'hsl(153 60.0% 53.0%)',
      brandAccent: 'hsl(154 54.8% 45.1%)',
      brandButtonText: 'white',
      // ..
  },
  dark: {
    colors: {
      brandButtonText: 'white',
      defaultButtonBackground: '#2e2e2e',
      defaultButtonBackgroundHover: '#3e3e3e',
      //..
    },
  },
  // You can also add more theme variations with different names.
  evenDarker: {
    colors: {
      brandButtonText: 'white',
      defaultButtonBackground: '#1e1e1e',
      defaultButtonBackgroundHover: '#2e2e2e',
      //..
    },
  },
}

const App = () => (
  <Auth
    supabaseClient={supabase}
    theme="default" // can also be "dark" or "evenDarker"
    appearance={{ theme: customTheme}}
  />
)
```

You can swich between different variations of your theme with the ["theme" prop](#switch-theme-variations).

### Custom CSS classes {#custom-css-classes}

You can use custom CSS classes for the following elements:
`"button"`, `"container"`, `"anchor"`, `"divider"`, `"label"`, `"input"`, `"loader"`, `"message"`.

```js title="/src/index.js"
import { createClient } from '@supabase/supabase-js'
import { Auth } from '@supabase/auth-ui-react'

const supabase = createClient(
  '<INSERT PROJECT URL>',
  '<INSERT PROJECT ANON API KEY>'
)

const App = () => (
  <Auth
    supabaseClient={supabase}
    appearance={{
      className: {
        anchor: 'my-awesome-anchor',
        button: 'my-awesome-button',
        //..
      },
    }}
  />
)
```

### Custom inline CSS {#custom-inline-styles}

You can use custom CSS inline styles for the following elements:
`"button"`, `"container"`, `"anchor"`, `"divider"`, `"label"`, `"input"`, `"loader"`, `"message"`.

```js title="/src/index.js"
import { createClient } from '@supabase/supabase-js'
import { Auth } from '@supabase/auth-ui-react'

const supabase = createClient(
  '<INSERT PROJECT URL>',
  '<INSERT PROJECT ANON API KEY>'
)

const App = () => (
  <Auth
    supabaseClient={supabase}
    appearance={{
      style: {
        button: { background: 'red', color: 'white' },
        anchor: { color: 'blue' },
        //..
      },
    }}
  />
)
```

### Custom labels {#custom-labels}

You can use custom labels with `localization.variables`. See the [list of labels](https://github.com/supabase-community/auth-ui/blob/main/packages/react/common/lib/Localization/en.json) that can be overwritten.

```js title="/src/index.js"
import { createClient } from '@supabase/supabase-js'
import { Auth } from '@supabase/auth-ui-react'

const supabase = createClient(
  '<INSERT PROJECT URL>',
  '<INSERT PROJECT ANON API KEY>'
)

const App = () => (
  <Auth
    supabaseClient={supabase}
    //highlight-start
    localization={{
      variables: {
        sign_in: {
          email_label: 'Your email address',
          password_label: 'Your strong password',
        },
      },
    }}
    //highlight-end
  />
)
```