Querying for device background colour

I have two basic UI designs for my app, one for light backgrounds, and one for dark backgrounds. Basically, The icons change from white to black depending on the background colour. I ahve approximated the selection of these to whether the platform is iOS (light) or Android (dark). However, given the option for android users to use skins, I wondered if there was a way of finding out whether the phone actually had a light or dark background?

Thanks.