A 50/50 mix of "Gunstock" and "Red Oak" stain from Minwax will be a close match to the flooring in your picture. I prefer Cabot, but I do not know their colors by heart. (Possibly only 25% Red Oak color)
Obviously, you'd want to test this out in various concentrations- slight differences in wood age/species/geography will make it accept finishes differently.
Brad
