2010 change body from white to gray?

Twenyten includes a Custom Background option in the Appearance sub-menu.

I don’t think that is what Custom Background does, unless I really missed something. That just changes the outer background, and not the content area, which is what I think Lloyd was really asking.

You can easily change the main content background and text color using my new Twenty Ten child theme, Twenty Ten Weaver, while keeping the look of Twenty Ten if you want. It also has over a dozen other predefined sub-themes, and lets you tweak lots of other stuff with Twenty Ten.

Replace:

#wrapper {
	margin-top: 20px;
	background: #fff;
	padding: 0 20px;
}

with:

#wrapper {
	margin-top: 20px;
	background: #333333;
	color: #ffffff;
	padding: 0 20px;
}

in the CSS file.