Hello! Oak is naturally blond. If you're looking for a unique color for yor wooden floor, oak is great 'cause it reacts really well to treatments. You can change the original look before or even after it's layed dawn. It's surely something possible to do, but only with a professional. I duoubt you can make it by your own. Maybe you can find the right professional in your city and have more informations about it. Anyways, just to let you know, yellow is going to be less strong by the years (it takes a pretty long time although).