Pro Blue is a version that ForumPeers.com used back in early 2000's for vBulletin forum that was up and going...
I have done the same look or similar to it with 2.0 of XenForo...
So if you find any bugs or anything you wanna change with it...go ahead and change them and let me know what you think of the style for XF 2.0, 2.1 and 2.2