The concept of 12 years worth of misunderstandings and inconsistencies being due to Scott being colourblind, the concept of people calling him PURPLE GUY when he was meant to be blue like a stereotypical security guard uniform
Nagito being silly aside I always liked the way he didn't mind humiliating himself if that meant others could reach a conclusion. It's a subtle way to show just how much he means it when he says he hates himself, how he'd never let himself have merits