> For the complete documentation index, see [llms.txt](https://docs.d5render.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.d5render.com/user-guide/effect/how-to-set-custom-background-color.md).
# How to set custom background color?
Added Custom Background Color to **Effect>Style** for a flexible control over the background color in the 3D viewport.
* This feature meets the request of custom background color in specific projects, such as rendering composition materials or parallel projection views.
{% hint style="info" %}
**Notes:**
* **Parameter priority:** This setting will be overridden by the background color set in the Outline mode. Disable the Outline mode to restore the custom background color.
* This parameter only affects the viewport background and does not change models, environment lighting, or reflections.
{% endhint %}