If you are running CM9 or AOKP or any other ROM that has a working theme chooser built in then this is a post that will interest you. These themes are something I have been using on my device for a while and I constantly switch between colors.
These themes keep the same exact stock ICS look except you can change the cyan blue color to Red, Orange, Green, or Purple. My personal favoite is green but the others are not any less impressive. All the basic components of the ICS theme will be changed to the color of your choosing. The themes are all free and are nice to give your device a nice little touch. Not much else to say about these themes except that I love them and you should try them out.
[appbar id= org.cerqueira.theme.Green]
[appbar id= org.cerqueira.theme.Purple]
[appbar id= org.cerqueira.theme.Red]
[appbar id= org.cerqueira.theme.Orange]