I am trying to change the background color because the default bright blue is straining my eyes.
Preferences > SALOME > OCC 3D Viewer > Background had no effect.
I found nothing else that seemed relevant.
How do I get a dark background?
Right click on the background and you can change it.
I just needed to restart the program for the change to take effect. There was no prompt to do so, so I never considered it.