Maybe you have an AMOLED powered Android smartphone and you know the importance of dark colors and the magic they do to maintaining battery life; maybe you just like dark themes and just like the new Android Market, the Google+ application has been skinned, adding a black version.
If you want to have it on your phone, head over to the source link and download the APK. You need to first uninstall your copy of Google+ and then install the black version you’ve downloaded. According to the author, the work is almost complete but expect a fully blacked out version soon. Until then, head over to the link below and get your black on!
Source: XDA Developers