TotalFinder: Colour differences on Dual Mode

I have just made a terrible mistake by deleting a folder I never meant to while on dual mode thus, is there anyway to have a very clear and light colour differences between active window and a none active one?
What mean there to differentiate where my attention currently is and where not. This might give me the notion of where currently am and what I am doing.

Ah, this sounds bad. I hope you were able to restore it from Trash.

I understand your point, right now the only visual clue in dual mode is blue selection background, which turns grey when you switch to other side. I agree that a better visual hint could prevent mistakes like this.