5high on "How to change the Site Content area colour in TwentyTwelve child theme?"

Hi,

I've started trying to do a child theme from TwentyTwelve, but can't find how to select all the site content background colour to keep it white/pale, as I'd like to have the page background the same as the site background (or transparent, which would work the same I guess??).

I've read heaps of posts but can only get so far... Currently I've used this code

#primary.site-content,
#content.entry-header, #content.entry-content, #content.entry-meta,
#secondary.widget-area, .front-widgets ,
#colophon.site-info {
	background-color: #cff1f9;
}

(an eg of what I'm after, though in a dark version, is our old/current site )

But if you look at my testing site here you can see that i haven't been able to find all the other containers for the content's background - particularly the gap between the widgets and the entire footer...
Please ignore the colour scheme, as it's just a way of finding out the different areas!

Any ideas would be much appreciated - thanks!