Most of the time the only visible portion of a mirror cabinet is the mirror itself, which takes up most of the front area, and the exterior of the cabinet, mostly its edges. Because mirrors do not look much different from each other, it really comes down to the finish on the exterior of the cabinet. In fact, the finish of the cabinet doesn’t necessarily have to blend with the finish on the dressing table, even though that would be nice in most cases. But they should definitely blend together. This will work if the dressing table and the mirror are of complementary colours.