I would appreciate help from those of you with a good eye for color and design. We are redoing several rooms, including new carpeting, paint, baseboard, and crown moulding. My question is: when we paint, would it be ok to use the same color on the ceiling, cottage white, as on the trim? Or should the ceiling be a different color? If it makes any difference, the walls will be a darker color called cliff rock which is a little darker than taupe.

The cottage white goes well with the cliff rock but will the crown moulding disappear into the ceiling? The rooms are roughly 15' by 16'.