Backgrounds can either be a flat color (defined as a hex value, such as #000000) or as an image (which is defined by the URL of the image).
Flat color backgrounds are easily created by adding the hex color value of the image as a property in the style section of your Blogger template. For example, if I wanted to add a yellow background color to my sidebar, I could add the line in red to the #sidebar-wrapper properties in my template code, like this:
