Change the background color of a blog by selecting the "Backgrounds" section of the blog's "Layout" settings and choosing the desired color option; bloggers can preview colors before selecting them, but be sure to save changes once the desired color has been determined. Customize the look of a blog site by trying out different background colors with the easy steps in this free video tutorial on social networking from an Internet professional.
Google's Blogger is an online publishing tool designed for ease of use. The programming takes a WYSIWYG approach, meaning what you see is what you get, so the changes you make will appear exactly as you expect if you make them using the tools provided. Your exact options will depend on the template you chose for your look when you designed your blog. If you have skill with HTML coding, you can further customize your background, but novices should stick with the tools Blogger offers.