I m using 'Dark Autumn Theme' of 'THEMER'
Quite Awesome it looks.
Smooth User Interface and customisable too.
I have used it on Samsung Galaxy Grand Quattro
You Can Download Themer Launcher from the Google PlayStore from the link given below
After Downloading :
1)Open the Launcher application
2)Pull The Navigation Drawer
3)Go to Browsr Themes -> Most Trending
4)Select The 5th Theme (Blue pic with leaves on it)
5)Click on Apply
You Are Done
And Here is how it looks on my Samsung Galaxy Grand Quattro
Flaunt this theme to your friends and Have Fun.