HOW TO MAKE YOUR FACEBOOK COLOUR CHANGE
This trick has following requirements
Mozzilla firefox browser
Stylish Addon
So here is the complete tutorial on how to install themes on facebook
1. Open firefox browser.If you donot have you can download it here
2. Now Download Stylish addon for firefox by clicking here.
3. After installation is complete restart your browser
4. Install Any of the themes below by clicking on the image
5. To switch between the themes you have installed on your firefox browser goto Tools>Addons>Stylish and disable all other themes except the one you want.
Best 45 Themes for facebook
transparent Green colour 2009 theme

windows Green black transparant

Window Vista Ultimate Skin for Facebook

Theme for Facebook – Jonas Brothers

Pink & love Skin Transparent theme

Facebook Yellow – Transparant Skin