Theme dev "nmiltner" and "Jackstraw" have created an all new theme chooser theme they call YABT! To run this theme you simply need to have a Rom installed that has support for Theme chooser themes. Then just head to the link grab the theme.apk install the apk and head to the theme chooser in settings and select the theme. This is a minimal blacked out theme, but it isn't like any other Blacked out theme that you have seen before. They have maintained the HOLO appearance while greys and whites as foreground colors for a unique look and feel. It also includes a little bit of transparency and gloss throughout. It really looks pretty slick! Everything here is themed out including Framework, SystemUI, settings, dialer, notifications, nav bar, keyboard, sms, mms, email (inverted), app icons, wallpapers, analog clock, power toggles and much more!
Check out the OP here