You may be better off going black since the room is so small. You can easily put up backdrop to change the colour. With such a small space I would worry that it would be difficult to light the subject without also spilling light onto the walls. 2x3m is very tight - you're going to have a hard time fitting in softboxes or umbrellas, even if only shooting a bust. Before finalizing anything you might want to see if you might be able to stretch out the space a bit.