Sketchup on Windows 10 UI both light and dark

Hi, not sure how this happened, but this morning I opened Sketchup and half the UI is light and the other half is dark, Making changes to the system in settings from light to dark makes no difference. Restarting makes no difference. Any suggestions on how to make the darkness go away?

See image for further clarification.

Thanks in advance

Figured this out, sorta. It was a Windows theme issue. Not sure why the custom theme had anything to do with this, but switching it to the default theme fixed it.