I normally don't do so, but I registered specially to tell you about the solution I've fond. I've followed this video
and here's what I've got:
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As you can see, the active window title is white, so are the buttons, and the background window has a light gray title. I've been using it for about a week and the only downside I found is that "+" and "×" buttons in Firefox are still black, but a) that's no big deal to me as I prefer using Ctrl+T and Ctrl+W rather than the above buttons; and b) there probably exists an add-on that will allow you to make them white too.
P.S.: I'm hardly coming back here anytime soon, so if you need the file (I plan on keeping it around until Windows 8.1 gets completely outdated), or if you got any questions, PM me in Skype: yung.playz.
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