We have cherry colored floors and blue dobermans (read gray). You can see every speck of hair on the floors and their dusty paw prints too. I wouldn't put in floors this color again, but we really like the flooring, so it wouldn't dictate us buying a house with similar colored floors. We just wouldn't install them ourselves again.
Also, ligher floors wouldn't show the dusty prints as much, but it would still show hair for us. So we really can't win.
We have a roomba. It helps a lot.