How to hide the background image (CSS help) ?

I am trying to hide the white background of the work in progress site http://ds2.wpengine.com/.

I tried using
.cnt .bSe article {
box-shadow: 0px;
background: none;
}

but that wont work. I know, I am terrible with finding the right selectors and classes :stuck_out_tongue:

Could anybody help me with the right code?