Stairway to...well, just the laundry room, really.

We just had chocolate-brown hardwood laid in the upstairs hall and also took the carpet off our back stairs and had the treads stained to match the hall. I love it so far, and this week of snow days allowed me to get all of the risers primed. Now I can't decide what to do with them! I was going to stick with white, but it's just a little too plain now that I've got the white primer on. I love black, but this wood is so dark it doesn't provide enough contrast. I'd love your input if you would be kind enough to become a Google follower and leave a comment.  Should I go with the wall color, which is Benjamin Moore's Fresh Olive? Or stick with white but add some type of detail?