I am not a designer, but I personally dislike seeing white white on ceilings when the walls are a different shade (of white or a color). Especially standard "ceiling white". It makes the ceiling stand out too much. For white walls, I would prefer to use the same white.

On the other hand, though, I am a big fan of subtle color on the ceiling and have seen many combinations of color, or a shade of off white, on walls with a complimentary pale color on the ceiling that looks terrific while not drawing attention to the ceiling.

Just IMO. What would please your eye, or go best with your decor, may vary.

I am pretty much over seeing all this white everywhere, but, if you still like it, then use the same paint on the ceiling. You could use a flat for the ceiling, a matte for the walls, and if you are doing trim too, then a satin or semi gloss.