I seriously can not stand the blue’ish color it comes up with. To change the default font color on reply messages in Outlook (this is as of Outlook Professional 2010 Version: 14.0.6123.5001 (32-bit)).
Go to File:
Click Options:
Click on the Mail text in the Navigation:
Click on Stationery and Fonts:
Here you can change the font, you can see in the above image I had clicked on the Font… button under the Replying or forwarding message section. I am so much happier with email responses that maintain formatting with my other messages.