Like a glass!! This is Transparent theme for Substratum (PS: it’s my favourite 🙂 ). Many apps of your rom will become transparent! You can choose a wallpaper and use it as background for your apps. Every time you change wallpaper, you have a new theme! I suggest to try this theme also with live wallpapers. The level of personalization permitted is really high, because you can choose to keep the original coolors of the apps, or to change them choosing from 19 different colors! And there’s more: you can choose also from 6 different styles and much more! All infos on Google Play, just click on the badge at the end of the page!