Study. Cozy study with bookcases and fireplace. Flooring is a ceruse wood finish, and they used ROMA's LowCer stain, Biocalce Classico, Terramare Velatura, and Peter Block Architects and Interior Designer, Beth Webb Interiors.
I've always loved the idea of grey painted rooms, but I never really want to go through with it because of the potentially "drab" or "depressing" aspect of it. BUT! Warm lighting and warm accent colours like this might solve that problem!