Take a look at this pic, is it possible to configure openbox to have this sort of blurred effect?
You need to use compositor for that. Like compton or compiz with emerald. There is original reddit post
You need to use compositor for that
What is a compositor exactly?
Compositor application which render your window. It's composite extension for X. You can read about different compositors on arch wiki
Eugene_619 Oh so it basically I install a compositor with OpenBox then.