The way to choose the right color especially in webdesign depends on many things. Personal favourites and the focus on the appliance of the site are important. Color theory and the meanings and psycological aspects of colors are often discussed. Here is a nice article about all these aspects:

http://sixrevisions.com/web_design/a-look-into-color-theory-in-web-design/

But what about how to find the right color? Who is faster and sure what to choose? In my daily work I often stumble upon different types of customers. Some give examples and know what they want. Others ask for propositions what to choose. Others compare printed colors with the monitors color, printed on whatever a printer.

I often wonder why the most difficult decisions are caused by people who ask many others what to do! With different monitors and different ideas and points of view. And see one thing – often it is more difficult with women.