Solibri v24.9.0 (and newer) offers two options for appearance, Light Mode and Dark Mode. The Dark Mode is available in all products. In earlier versions, only Light Mode is available.
Light Mode
The dark mode offers a darker, higher-contrast color theme, making long work sessions easier on your eyes:
You can switch between the two modes through the Appearance option in the General Settings of Solibri. Note that when you change the appearance setting, you need to restart Solibri for the switch to take affect: