I saw an interior design program where they showed a dark room with a pale coloured carpet. They ripped up the carpet and treated the floorboards to be dark but with a high gloss finish. The room was brighter as a result. They did this to prove that the high gloss finish, which reflects light will brighten up a space more than a dull paler colour.
However, If I were you, I would get advice from an expert ( not a builder) before spending a lot of money on flooring which you are unlikely to change for years.