Do you have the User Guide/Manual?
You may be able to go into the menu's and adjust the colors.
If that fails to work you can could go to Samsung's website for more assistance. That will probably not be too successful unless they can walk you through the menus and fix the colors.
However, you may probably be better off just returning the TV to the store and get an exchange. Should not have bad colors straight out of the box - just a little tweaking should be all that is necessary.