# BackgroundTypeWallpaper

Source: https://core.telegram.org/bots/api#backgroundtypewallpaper

[Documentation index](../llms.txt)

The background is a wallpaper in the JPEG format.

| Field | Type | Description |
| --- | --- | --- |
| type | String | Type of the background, always “wallpaper” |
| document | [Document](document.md) | Document with the wallpaper |
| dark\_theme\_dimming | Integer | Dimming of the background in dark themes, as a percentage; 0-100 |
| is\_blurred | True | *Optional*. *True*, if the wallpaper is downscaled to fit in a 450x450 square and then box-blurred with radius 12 |
| is\_moving | True | *Optional*. *True*, if the background moves slightly when the device is tilted |