Container box color removed

I’m using the 2010 theme (www.infoprincessonline.com/SacKids) and I’m trying to remove the container color so that it’s transparent as it is in another site I’ve done https://www.WebbsJanitorial.com (2011 theme). I cannot pinpoint if it’s the difference in themes that won’t allow me to duplicate this design feature on my SacKids site….

any ideas?