Have you heard about the 5 second rule before? 5 seconds is all the time you have to make a favorable impression on your website visitor before they will decide to stay or leave. In 5 seconds the visitor must be able to determine who you are, what you do, and why they should choose you.
Colors can also help a visitor to determine if they will stay on the site. A nice background color can set the tone of the site and put the visitor in the correct frame of mind for viewing. Make sure that the colors you use give off the correct feeling and impression of your business.
Be careful of how many colors you choose because using too many can be distracting or overwhelming.