What's wrong with cozy rooms? Why does everyone suggest we paint any less than huge room a light color to "open it up"? I say go by the color you LIKE not what's going to mentally add a few inches.
My room is tiny and it's painted brown. I know if some people saw it or heard that I wanted a brown room, they would have said nooooo you need to open it up! No, I do not. It's fine the size it is.
This is the color
With something similar to this(mine has elephants and giraffes on it)
And ya know what, it's tiny and looks damn good!