> ## 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.

# prefersDark

> Controls whether the resulting embed session has a light or dark mode appearance.

In the **Embed URL Builder**, this is the **Prefers dark** field.

## Syntax

```markdown theme={null}
prefersDark=<mode>
```

## Properties

<ParamField path="prefersDark" type="string">
  The appearance mode for the embed session. Value must be one of:

  * `true` - Enables dark mode
  * `false` - Enables light mode
  * `system` - Appearance uses system setting
</ParamField>

## Examples

```markdown title="Example prefersDark" theme={null}
prefersDark=false
```