How to set solid color as Backgrounds ! about drawerjs HOT 2 OPEN

backgroundCss in https://github.com/carstenschaefer/DrawerJs/wiki/Appearance
Is not this what you want??

from drawerjs.

I am trying to use it like this while initializing the Drawer JS, but its not working
is that the right way?
and if i want to change the background after init how would i do that ?

new DrawerJs.Drawer(null, {
        plugins: drawerPlugins,
        backgroundCss: 'url(' + globalURL + '/' + 'web/images/blue.png) repeat',
...MORE CODE HERE
})

from drawerjs.