SoGo-Dark

How to Use This Theme
Save this file as custom-theme.css in your SoGo installation's web resources directory (typically /usr/lib/GNUstep/SOGo/WebServerResources/ or similar, depending on your installation).

Add a reference to this stylesheet in your SoGo configuration. This is typically done by adding the following line to the [SOGoUI] section of your /etc/sogo/sogo.conf file:

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SOGoUIAdditionalCSSFileName = custom-theme.css;
Restart your SoGo service for the changes to take effect.

Notes
This theme uses CSS variables for easy customization. You can modify the colors at the top of the file to match your preferences.

Some elements might need additional styling depending on your specific SoGo version and configuration.

The theme covers the main interface elements but might not style every possible component.

For best results, use with a modern browser that supports CSS variables.

You can adjust any of the color variables at the top to customize the theme to your liking.
cd /opt/mailcow-dockerized/data/conf/sogo/
wget -O https://github.com/BiohazzardXIII/SoGo-Dark/blob/main/custom-theme.css