This is a theme I created to mimic Ubuntu's Ambiance Theme. It also is set to a size proportional to that of Sublime Text's ⌘⇧P drop-down, so if you set Alfred to be at the top, center of your screen, it will look very similar!
Also if you like the Ubuntu Mac Theme I created, just head on over to the website below and check it out! You'll have to do some workarounds if you really want to make it decked out. ie: You'll need Obsidian Menu Bar to make the menu bar's text turn white, you'll need BarTender (a mac menu bar controller) so that you don't have a ton of app icons in the top right, etc.