We've recently moved and I'm desperate to paint over an oppressive colour in a downstairs bedroom. I read somewhere that when used in north-facing rooms whites work best if they have a slight hint of green. Does anyone know if this is the case and can suggest a good white to use? The skirtings and window frame are currently varnished wood and the carpet is a (not unpleasant) teal blue - for now these will have to remain, but am hoping a good white will really open up the room.