---
description: API reference for DesignLibrary component (iOS Library)
title: DesignLibrary
image: https://developers.cloudflare.com/og-docs.png
---

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# DesignLibrary

Last updated Aug 24, 2026|Copy as Markdown|[View as Markdown](https://docs-durable-objects-instance-replaced-errors.previews.developers.cloudflare.com/realtime/realtimekit/ui-kit/api-reference/ios/design-library/index.md)|[Agent setup](https://docs-durable-objects-instance-replaced-errors.previews.developers.cloudflare.com/agent-setup/)

The central design token library providing color, spacing, border width, and border radius tokens. Access through the `DesignLibrary.shared` singleton.

## Access

```swift
let designLibrary = DesignLibrary.shared
```

## Properties

| Property     | Type              | Required | Default | Description                                          |
| ------------ | ----------------- | -------- | ------- | ---------------------------------------------------- |
| color        | ColorTokens       | \-       | \-      | Color tokens for backgrounds, text, and brand colors |
| space        | SpaceToken        | \-       | \-      | Spacing tokens for margins and padding               |
| borderSize   | BorderWidthToken  | \-       | \-      | Border width tokens                                  |
| borderRadius | BorderRadiusToken | \-       | \-      | Border radius tokens for corner rounding             |

## Usage Examples

### Access design tokens

```swift
import RealtimeKitUI

let designLibrary = DesignLibrary.shared

// Access color tokens
let backgroundColor = designLibrary.color.background
let textColor = designLibrary.color.text

// Access spacing tokens
let padding = designLibrary.space.space4

// Access border tokens
let borderWidth = designLibrary.borderSize.thin
let cornerRadius = designLibrary.borderRadius.rounded
```

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