1 Answer

You need the app that does this. Only you can see the color change. Your friends will not see it. 

Instructions
1
Install the Greasemonkey add-on. To do this, visit the Greasemonkey web page in the add-on directory section of Mozilla's website, Mozilla.org. On that page, click on the “Add to Firefox” button, and follow the on-screen prompts.

The Greasemonkey software program allows you to run extra lines of code on top of the codes present in a web page you view.

2
Add the Facebook Auto Colorizer script to Greasemonkey. The script is available on UserScripts.org. Click on the link “Remotely hosted version.” A box will appear. Click on “Install” in that box.

Scripts are the code packets that Greasemonkey runs. You may run many script packets at a time, which allows you to change the functionality of your Internet browser completely.

3
Visit the Facebook website. Each profile page you visit will change color, including background color, to match the profile picture.

Read more: How to Make Your Facebook Background Change Colors | eHow.com http://www.ehow.com/how_12056695_make-facebook-background-change-colors.html#ixzz285wuGDKK