Colors for e-mail
I'm getting more and more text e-mails set in different colors (often blue or brown) or with black text placed against colored backgrounds (light shades of blue, gray, or yellow, etc.)
Although the use of color in e-mail helps set the sender apart, color often makes the e-mail harder to read. Black text against a white background makes for easy reading: as you depart from that, you may run into problems.
Guerrillas always place functionality and results against attempts to decorate or entertain.