With Gmail, your choices are cool and the themes are very cool.
Google came out with Gmail themes for customizing the look of your Gmail account. Check out the Official Google Gmail blog article: Spice up your inbox with colors and themes.
I use a different theme to help me keep track of the Gmail account I am on. I color code the Gmail accounts for different customer’s Gmail accounts.
Take a look at this feature and all the themes that are available. I’m sure you will find one that you will like. My wife found her favorite. And since I couldn’t make up my mind which one I liked the best, I reverted to using a classic style for one and some hip-hop styles for others.
Have a little fun. Put some creativity into your life. You never know what might spur a new creative marketing thought in the brain.