The theme installs through Substratum Theme Engine app, that you can download here, IT REQUIRES ROOT, Busybox, and a Layers or Substratum compatible ROM: https://goo.gl/BB5eio
**If you have black text in contacts, install this app https://goo.gl/nH1xlo , download the package for your system (choose aroma!), and install only the contacts app.
Here the official wallpaper, used in the previews: http://goo.gl/teUry8

For any problem (check this FAQ first https://goo.gl/czNenU ) or suggestion, send me e-mail at piereligio@gmail.com
or join my comminity and ask there https://plus.google.com/communities/108109701626930507263

The theme has been tested on stock Android Marshmallow, Android Nougat, Oxygen OS, YAOSP ROM (a Layers ROM), some Substratum ROMs.

Themed elements:

-Android N-ify XPosed module;
-AOSP Contacts** ;
-AOSP Dialer;
-AOSP Keyboard;
-AOSP Launcher;
-AOSP Messages;
-Calculator;
-Car Throttle dark mode;
-Documents/Download UI;
-Framework-Res;
-ES File Explorer;
-Google Calendar;
-Google Chrome;
-Google Contacts** ;
-Google Dialer;
-Google Drive;
-Google Keep;
-Google Keyboard;
-Google Hangouts;
-Google Inbox;
-Google Launcher/Now;
-Google Mail;
-Google Messenger;
-Google Play Music;
-Google Play Store;
-Google Plus;
-Google Translate;
-Kernel Adiutor's dark mode;
-N style notifications;
-Nova Launcher's searchbar;
-Package Installer;
-Root Explorer dark theme;
-Settings;
-Solid Explorer dark theme;
-Substratum app;
-SuperSU;
-SystemUI;
-Telegram (only partially themed. For full theme use Plus Messenger, a Telegram client, and download this and apply it from personalisation settings: goo.gl/JHmUww );
-Twitter night mode;
-WhatsApp.

Thank you all for supporting me. :)

Layers Dark RRO theme stock Marshmallow Android 6 6.0