The blue is a bit dull compared with the current "Cologne Blue" which I was enjoying. In fact, I prefer the current version.
The current colors are already replaced with the "new" (real) ones in the CVS, as I failed to correctly convert the blue tomes the first time. Maybe we should vote on the blue tone (!), but IMHO you'll be the minority...
One suggestion: There appears to be no link back from a 'talk:blah' page to the 'blah' page provided automatically on the current "Cologne Blue" For example if I am looking at "Talk:Differential equations" how do I get back to "Differential equations" without doing a search?
This, among other things, is already taken care of in the CVS. It will go online with the next software update.