This has been on my mind for a while, so I might as well say it: the transparent nature of the Peerunity logo is not, in my view, a good thing
When you look at the logo at the bottom of http://www.peercointalk.org/index, its predominant colour is black
When you start to load the Peerunity client, the first thing you see (while loading) is a grey-blue version of the logo - because the loading graphic is grey-blue
When the client is open, the mini-logo (top left) is is blue, because it is against a blue bar
At this location, the logo is white - http://peercoin.net/wallet
It is also white on the Peerunity facebook page - https://www.facebook.com/pages/Peerunity/827649853923453
But here, it is black again - http://www.getlocalization.com/Peerunity/
In short, I think we need to decide on a single, fill-in colour. Otherwise, it undermines brand recognition, etc.