I also like the darker leafs. But the man at the nursery told me the lighter leaf ones will be bigger by January. So I am waiting to see. The Poinsettia is what is called a disposable flower. Its really designed to be thrown out after the holidays.
Most people do.
But if you want to give it a try. After some time, new shoots will appear. Then repot and grow warmer. Bring it outside if possible in the summer. Feed once every two weeks with a fertilizer that contains micronutrients.