Check out your machine to see if it is using automatic filters. In the old days, the color intensity could be varied by adding different colored filters to the lens to get the problems you are describing.
I would check your manual (may be online these days :)) and take some test photos of colors against white background and play with the settings until they come out right. It may mean your factory settings were installed incorrectly (or a piece of plastic got left over the lens to keep it from getting scratched -- and that plastic needs to be removed to get true colors).
Good luck!