The houses that have wood stairs look formal. When you know how to paint stair risers white, you will give the stairs an informal look such as cottage or country look of stairs. This is going to fit better depending on the décor you have in your home. When the wood has a medium tone but which is not that dark and the walls look light, painting white will prevent the room to look darker. However any other color can be used to light up stairs. Some people like to go for the all wood since they do not like to deal with marks on white paint. However, this is not going to be an issue for a person.