Ambrose followed her glance and winced, noticing a pair of his housemates were the ones at that cauldron. "They're kind of a mess," he agreed, then frowned, realizing he shouldn't be badmouthing housemates with a Hufflepuff. "Not that they're much better," he said, pointing to another pair that were dealing with a cauldron that was smoking much more than it should be.
Glancing at their cauldron, he stood up. "Okay, it's purple. Well, more of a dark red, but pretty close to purple, and definitely no longer grey."