Without seeing the house, and knowing the colour options from your chosen window brand etc it’s not easy.... if it’s more a reddish brown I’d say go dark grey, but with some browns that could be terrible! With other browns a taupe could be lovely. I think you could get better advice if you added a picture of your house. (And sometimes it’s better to go with something less fashionable like white if that’s really what looks best with your brick!)

A good picture or 2 of the house will help others help you.