Steam

The official Steam client can be themed using the Noctalia color scheme through the built-in theme system.
This requires the open-source modding framework Millennium and takes advantage of the Material Theme to provide dynamic color integration.

Setup

1. Enable Steam theming in Noctalia:

   • Open Settings → Color Scheme → Templates → Misc
   • Toggle on Steam

2. Install Millennium: you can find instructions for your distribution on the installation page.

3. Install Material-Theme: copy the Theme ID from the theme’s page on steambrew.app, and install it in the Millenium Theme settings.
   After that, you should see the theme installed but not enabled yet:

4. Enable the theme by clicking on the “Use” button.

5. Click on the drop-down on the right to configure the theme:

6. In the “Color” drop-down menu, make sure to select “Matugen”.

7. Regenerate a color scheme in Noctalia (for example, toggling dark-light mode, or changing the wallpaper), and restart Steam.

Troubleshooting

• Theme not appearing: Make sure you’ve enabled the theme in Millenium settings.
• Colors not updating: Restart the Steam client fully (Steam menu > Exit) after installing the theme and toggling Matugen option. Also make sure Millennium is installed and running correctly.
• Theme looks broken: Ensure you’re using the official Steam client and have the latest version of Millennium and Material-Theme.

Additional Notes

The theme will automatically update when you change color schemes in Noctalia.