Monochrome chic. Simple is best in a narrow hallway. White painted stairs make them appear wider and the grey runner is both practical and elegant. Seek out a slim console - vintage or modern - thats useful and decorative but not space-consuming.
Ordered 3 runners from Wayfair at $35 a piece. I love the look and it only took 3 or 4 days total (including painting the treads Annie Sloan Graphite and the risers white)! Took Eric and I to do the nailing part. Even with measuring each step it takes two people to make sure the rug is in place. DIY stair runner