After turning a wall on the dungeon level corridor a blue color, Kate took the stairs and headed for the next floor up. She arrived on the kitchen level--home of the Hufflepuffs and house elves. And food. Let's not forget the food came from here. Kate wandered around until she came upon a fireplace. It was huge, with plenty of thing around to try and turn a different color.

She walked up on a pot and immediately thought it would be a good object to cast on. "I'm sorry, house elves. The professor said he'll come around and change this back to its original color," she said. Even though she didn't see any elves around, she thought they might be lurking nearby. "So this is only temporary..."

Kate looked at the pot and imagined it a Ravenclaw blue color. Raising her wand, she said, "Colovaria!" The pot began changing colors. "Colovaria!" she said again for good measure. A few moments later, the entire pot was a blue color.