Add class name to body
use class namebg-*
,bg-*-darken
,bg-*-lighten
,text-*
,border-*
All bg-class, Apart from faded, all text color will change to white
of course you can overwirte with text-class
Use opacity to make dynamic separate layout by class namebg-dark-opacity-*
,bg-white-opacity-*
Mix custom background-color
Inline background-color