Place your cursor over the post you want to change the background color of. Click the "Edit" link that appears beneath the post's title. Click the "HTML" tab above the post's editor toolbox.

Whether it's the text, text box, a table, or the entire page, changing the background color can elevate your Google Docs project. Here's how to do it.

Learn how to set the background color for selected text (instead of the entire document) in TextEdit ...

You can change the color of the entire page using a solid color, a gradient or even a picture using Publisher's Page Background feature.