There are so many more options.

• .container
• .wrapper
• .inner-wrapper
• .outer-wrapper
• .rapper
• .notorious-big
• .2pac

I have this in one of my global userstyles:

#page, #Body, .Item /* please stay away from web dev */

And then there are things like <div class="h1" (and actual h1) with background-color (well, some p and a too). A text element needs no background-color, that’s a container-element thing.