How much do you know about colors? How well you know how to use them? And it doesn't matter if you are a web designer or a photographer. Photographer designs his frame instead of the web page. The article "Choosing Color Combinations" is written for web designers in mind, but as a photographer you better know it as well.
Don't forget to check the links provided in the article. For example, the link to "Color in Motion" directs you to a nicely done interactive flash movie, where you can learn about meaning of the colors and the message they may convey.