Very nice work! There is one part that my personal taste isn't lining up with, though. The darker part of the gradient on the control panel items list seems a little too dark to me. It's almost like the thin blue line on the left is casting a shadow on the icons, which make them look like they're almost trying to hide.
This is coming from someone that prefers a good CLI most days, so use as many grains of salt with this as you deem necessary. 
