Custom CSS

This allows you to extend the theme with your own Custom CSS.

Important Notes

It's entirely possible to break the UI by using this feature. Use with care.
Keep in mind that the upstream variables have no guarantees, they may change in the future.
Make sure to disable Custom CSS when troubleshooting issues.

The New UI can no longer inject CSS into pages like the Store/Community/Profiles/Etc. The Library/Chat/Overlay are fair game however.

A number of color theme presets are provided already, but you may still wish to override specific colors.

Here is an example of overriding accent colors:

:root
{
	--adw-accent-bg-rgb: 53, 132, 228;
	--adw-accent-fg-rgb: 255, 255, 255;
	--adw-accent-rgb: 120, 174, 237;
}

To do anything more advanced than editing the predefined variables, you are going to need to find out CSS Classes that Steam Uses for its UI.