I know this thread is long abandoned, but just in case somebody googles and comes across this one, but not the newer one:
I've posted my solution here: http://www.eightforums.com/customization/8724-windows-8-desktop-ui-change-title-text-color-7.html
And this is how it looks on my system:
I normally don't do so, but I registered specially to tell you about the solution I've fond. I've followed this video https://www.youtube.com/watch?v=lYVUZedD8qM and here's what I've got:
As you can see, the active window title is white, so are the buttons, and the background window has a light...