---
title: AppTheme
description: API reference for AppTheme component (iOS Library)
image: https://developers.cloudflare.com/dev-products-preview.png
---

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# AppTheme

The application theme singleton that provides pre-configured appearance objects for UI components. Use `AppTheme.shared` to access default appearances or call `setUp(theme:)` to apply a custom theme.

## Access

Swift

```

let theme = AppTheme.shared


```

## Methods

| Method                         | Return Type | Description                                           |
| ------------------------------ | ----------- | ----------------------------------------------------- |
| setUp(theme: AppThemeProtocol) | Void        | Applies a custom theme conforming to AppThemeProtocol |

## Usage Examples

### Access default theme

Swift

```

import RealtimeKitUI


let theme = AppTheme.shared

let titleAppearance = theme.meetingTitleAppearance

let clockAppearance = theme.clockViewAppearance


```

### Apply a custom theme

Swift

```

import RealtimeKitUI


class CustomTheme: AppThemeProtocol {

    // Implement required appearance properties

}


let customTheme = CustomTheme()

AppTheme.shared.setUp(theme: customTheme)


```

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