S4 with Lollipop, 5.0.1: Dark mode for dialer, contacts, messaging?

[mikesdak]

Hello.
I have an AT&T GS4 SGH-i337. I have setup my lock screen and most screens to a black or dark background, for battery purposes mainly. Is it possible to set the messaging, dialer, and contacts in Lollipop to use a dark background? (and hangouts, too) I am satisfied with the standard versions of these, just want to change the color. Is there some sort of galaxy theme or skin to do this?

Thanks in advance,