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

# theme

> Customizes the styles of the resulting embed session with a built-in Omni application theme.

<Tip>
  To use your own theme, use the [`customThemeId`](/embed/setup/url-parameters/customThemeId).
</Tip>

In the **Embed URL Builder**, this is the **Built-in theme** field.

## Syntax

```markdown theme={null}
theme=<theme_name>
```

## Properties

<ParamField path="theme" type="string">
  The name of a built-in Omni theme. Value must be one of:

  * `vibes`
  * `dawn`
  * `breeze`
  * `blank`
</ParamField>

## Examples

```markdown title="Use vibes theme" theme={null}
theme=vibes
```