Using custom CSS, you can add a colored background to your posts without editing your posts in other ways and without changing the background of the rest of your blog's body.

WordPress' built-in editor has an HTML mode that lets you override the background color of a post by changing its CSS (Cascading Style Sheet) background-color attribute to the color of your choice.

CSS works in combination with HTML. We can create buttons, links, and other elements using HTML and then using CSS we can change those elements’ size, color, position, etc.

Wybiral was able to do this by creating a grid of HTML DIVs that utilize CSS :hover selectors to request a new background image when your mouse moves over a box on the grid. As the image requests ...