This is a Windows 11 feature (I don’t know Mac)
In addition to dBpoweramp, it affects other apps and some Windows screens but not all.
To set …
In Windows Settings>Personalisation>Colours>Choose Your Mode
I have mine set to Custom with Light in Windows Mode and Dark in Default App Mode
I’m in test mode for a while, not sure its a keeper, it does make for an easier read (for my eyes), maybe I need to get used to it and all the screens it shows on.