Medium to light brown would be my choice. When I look at wood flooring with clients, I tell them "not too orange, not too red, and not too yellow". I like the floors in the photos below. The third floor, which is the lightest, will give a more contemporary look than the others. The point is to make the floor contrast somewhat with the cabinets. It should not be the same color as the cabinets.
Carolyn Albert-Kincl, ASID