You can now say goodbye to unofficial Gmail themes hacks, as Google now officially supports and provides Gmail Themes for a refreshing look to your Google mail account, Google Gmail team unveiled the new themes with 30 brand new themes to spice-up your mail-box with colors, the Gmail theme styling looks quite similar to Orkut Themes, the feature will get rolled out to all users in upcoming days and can be accessed from the Theme Tab in your Gmail settings page.

Gmail Themes In Action