Google’s beloved web-based email client has always been ripe for third-party design customization, but now Gmail is officially riding the interface customization train by offering 30-some new themes to spice up your inbox.

Login to your gmail account and go to Setting and then look for Themes. It should be the last tab at the right of the settings area. I love the Ninja Theme…

Check out the Themes tab in Settings to personalize the look and feel of your inbox or return to the classic look.