OK, I currently use Windowblinds 10 on my Windows 10 system, I just renewed Object Desktop and saw this new skinning program called Curtains.

Here's what I do, I use a Dark Theme in Window Blinds, (Black WIndows Frames etc....I also have have the background of all my windows and Apps (Like Notepad+++) set to a "Light Grey", because it's blinding looking at Black text on a bright white screen, and the same goes with the entire WIndows interface actually.
If I open up a folder, in a window, the background of the window is the same light grey, as not to blind me.

Now, I currently have windows using a light grey background for all of my open windows, folders, and apps, but I stumbled on it accidentally in WIndowBlinds without really knowing how I changed it of what I changed.

Does CURTAINS, have this ability as well, but makes it easier to do?
Also, can Curtains be told to ignore/exclude/not skin certain apps, in the same way you can tell WindowBlinds to ignore certain EXEs?