What kind of surrounding décor can be used around hall runners?

It's up to you! There are lovely simple ways to decorate alongside your runners. If this runner is in your hallway, keep the decor simple and out of the way since this is a high-traffic area with people in and out. Tall planters with pretty plants make for pretty decor and can match patterned or solid runners. No fuss pots and vases like terracotta can create an easy earthy look. Another great idea is having an array of framed art on your walls to complete your look. Pinterest is a great source of fantastic ideas too!