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.

How to Make Backgound Color in Dreamweaver. The Adobe Dreamweaver HTML editing program lets you create newsletters, websites and anything else that uses HTML code. Though most of the design is ...

Learn how to make Terminal use a user-defined background image each time you open a new window.