Change Your Message Color

If you want to control the color or font that Outlook 2010 uses when you compose or reply to an e-mail you can go to File | Options find the Mail section along the navigation pane on the left and then the fourth button down is "Stationery and Fonts".  Click that.

You'll see this dialog box...Using stationery in Microsoft Outlook 2010

From here you can specify what font you want to use (including color) when you create a new message or a reply.

CAUTION: Don't get too carried away with fonts in e-mail. It may be tempting to use pink Edwardian Script on a green background but really, don't. (especially in business e-mail).  It's hard for your recipient to read and frankly kind of annoying for most people.

Special tip - if you want Outlook to automatically use a new color for your text when you're replying or forwarding text, just check the box about 2/3 of the way down the dialog box that enables that.