MUST BE ROOTED!
MUST HAVE CYANOGENMOD THEME ENGINE!
Will NOT work on stock ROMs... Don't ask!
I run Inverted apps mostly and that's what this is tested on, so grab the inverted copy of the app you're thinking about complaining about! (Inverted apps are apps that once were white and now are black... all the backgrounds and fonts were swapped in color)
If you get a "Theme Improperly Compiled" error message... follow these steps:
Apply system theme
Apply Theme (theme applies)
Theme based off the popular "Theme Chooser" theme engine. This app will transform the look of your phone into a "Galaxy Cream Sandwich" experience! The free version includes settings and systemui tweaks and is designed to give you a taste of this theme... The paid version has many more tweaks including popular icons and other parts of the device!
Changelog 2.0.0: 02.04.2013
Updated to CM10.1 (4.2)
Reworked ALL the purple icon images
Other Misc fixes
Full changelog details: http://forum.xda-developers.com/showthread.php?t=1515987