Website Background Colors and Graphics: What You Need to Know Before Designing Your Website
Tip #1 - Don't Distract
Tip #2 - Know Your Colors
Colors have positive and negative effects on people's psychological interpretations of what you are presenting. Because of this, you should evaluate your product and what you want people to think when they see your product and use the colors accordingly. Keep your audience in mind as well because men and women perceive colors different, so you might use one set of colors if you are marketing to mostly men, another if you are marketing mostly to women, and so on and so forth. There is plenty information on the use of color and how you can make it positively impact your website and visitors impressions rather than the other way around.
Tip #3 - No Hidden Text
No matter how important it is to you to get listed in the search engines do not think that including hidden text on the background of your website, or anywhere for that matter, is going to get you a better ranking. All that using hidden text will do is ensure the search engines won't index you and that you will probably blacklisted forever because of your actions. This is exactly the opposite of what you want to accomplish so be sure to steer clear of anything that might risk your standings with the search engines.