Make MailDroid your own by adding color and style. After installing this plugin, you will get access to additional themes to use under the themes section in the settings menu in MailDroid. You can use these themes and the existing styles section in settings to make MailDroid look the way you want.
NOTE: This plugin requires MailDroid 3.50 or above. If you are on MailDroid 3.90 or above this is no longer needed.