Update 3/12/2012: nowerries found out how to fix the Ubuntu Software Center colors and here are the instructions Thanks buddy
Hey just read the thread and though you might like my fix for USC on dark colored themes.
"Only bug I have noticed so far is fonts unreadable in Ubunut Software Center the fix for this is to in terminal type...
sudo gedit /usr/share/software-center/ui/gtk3/css/softwarecenter.css
.... and change the color value of @define-color super-light-aubergine to what ever color you want to define background."
What this means is say you want it black just change the @define-color super-light-aubergine to #000000 I'm looking into how I can add this css file into my themes so it will look to that instead of the one he mentions in /usr/share/software-center/ui/gtk3/css but until then try it it does work
Updated 2/17/2012: This is the completed GTK-2/3 theme. I fixed the GTK-2 theme so if you just downloaded it try again
Just something I came up with, it's totally based off of adwaita I re-colored and tweaked everything. I may even add different colors I like this one because of the slider button images and the button look. I'm still learning as I go hope everyone likes it
Also I used the window borders from of ANewStartBlood by *alecive [link]