I agree with Sharon - the gray family is the right way to go. Make sure that they are "warm" toned grays.

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

Accessible Beige by Benjamin Moore would be a good beige as it has a slightly pink undertone that would pick up the color in your pillows. I wouldn't go a light blue, as that seems more in keeping with bedrooms, IMO.

Nice reno :) Few things imo... don't think you need any artwork next to the hexagonal mirror, it could get too busy, if you're after a more balanced look I would move the chest of drawers & mirror to the left more centered on the wall, then relocate the white rack to the other side near the door in place of where the bin is now, not sure the bin should be a feature and be the first thing you see when entering the room, if the drawers have moved that far corner may now be better for the bin... yes the wall above the bed definitely needs some artwork, which I think should be as wide as or wider than the bed, if a large artwork is too costly maybe three squares alongside each other to create the width, stick with the style of the room (can't quite work it out) and pick colours to complement the more permanent fixtures like the blinds rather than colours from the bed linen etc which will change