There is really much more that should go into making a decision such as this one....For example, furnishings, other wood finishes in the proximity of these floors, the lighting in the area etc. Obviously, darker wood in a low light area might not be the best route to go.
Keep in mind also that the natural aging process also can cause the wood coloration to change over time and darken as well.
I would recommend going to one of your area's building supply stores and asking for wood samples that represent the various tones you might consider and take them home to try out. This simple process may provide you with the clarity you are seeking.