SO we had new carpet installed in our rental unit. The walls are a dark hunterish green with beige carpet, other walls on the first level are a light blue with flooring a brown/grey/blue tile
we picked out a grey colored rug, hoping it would wear better than the beige one we took up.
It looks blue

I mean not terrible but it clashes with the green walls.
What color or colors can I paint the walls to make the rug appear more grey?