The word House is always in blue
Navidson often says the word "Delial", which Karen always dislikes
Whenever the story of the Minotaur is mentioned, this effect is used, This is the story of the Minotaur. The story is mentioned to compare the House's hallways to the labyrinth that the Minotaur was held in. Implying that it's possible that if someone created that House, it could have been made to hide something that the creator didn't want the new inhabitants to find.