What could be cozier than a pair of men's flannel pajamas?
Warm and dark colors may make a room feel smaller and cozier while cool and light colors can open up a small space.
In more intimate settings like dens or bedrooms, you might want to choose darker flooring, which can make the room look substantially cozier.
Alternatively, if you live in a cooler climate the warm terra cottas, olives, and browns might make the room feel cozier.
Use the warmer tones on large or high ceilinged rooms to provide a cozier atmosphere.