If the ceilings are low, go for a slightly lighter tone - this will effectively heighten your ceilings - also pale colours push the walls back. So perhaps not white but a pale grey, cream or beige.

I think the white trim gives it a much more contemporary look. It's more work to have it done in a different color, but the overall look is cleaner.

Small all in one condo room not sure what color to use for walls after removing wallpaper

I'd like to suggest that the most important thing here is more about who is using the room. If It's a child's bedroom use lovely children's curtains - there's so much around and any pattern could pick up the wall and floor colours. If a guest room and not used often I'd suggest a beautiful velvet or good quality Linen and forbid the little ones from going in to that room!!!!!! alternately a blind attached at floor level could be raised or lowered so the view is still there but with privacy from waist height perhaps. Good luck. Bee