General
Color defines a logo
When you get to own a color as much as Coca-Cola does, you don’t need much more around it.
The wrong color can make a great logo look like something a friend left on your bathroom floor the morning after a party.
Take a look at this brief article at FastCoDesign, then ask yourself: How much does color define a logo? Truth-be-told, you should probably spend nearly as much time thinking about your color use as you do designing the logo.

I’ve seen other Mac sites that offer tips to accomplish this that range from the outrageous advice that you must delete all your email accounts and re-add them in the order you want them to appear, to the less dramatic but still cumbersome idea that you must uncheck the email checkbox in the Internet accounts preference pane and re-enable email in the desired order.