it'll be in the blacked out theme that should be available soon....but you can probably find just that app in the theme section possibly under team inversion conversion. look for escnead69 i think he has it.
well the colorize widget does black too...but it don't do the facebook app which will be what you want i suppose....
but this is the latest one i believe here.
i don't which one you got but there should be directions in the post yuo got it from...if it tells you to install from an app manager you need to make sure the one you have on your phone is uninstalled 1st