Can I edit my page colors, background, etc.?

Yes, you can.

First, click on 'Settings' - in your right hand navigation/menu column under Inbox, Alerts, and Friends you'll find 'Settings'.
Then click on 'Appearance'.
Then click on the link labeled "Edit Appearance Page".

From here you can select any one of the available templates and customize it to your needs.
You can customize your template even further by clicking on the Advanced tab and customizing the CSS file.

If you need help with CSS, http://www.w3.org/Style/CSS/ is your friend.
If you're looking for a web color chart, http://html-color-codes.com/ is your friend.