Disclaimer: Not Mine.
It's a rare day than Jehan's clothing is lacking patterns, and it's an even rarer occasion that it actually matches. The first time Courfeyrac comments on his outfit, a floral button-down shirt tucked into a pair of jeans with a different floral pattern, he replies, "Patterns make my ass look cute." When he walks away after the conversation is finished, Courfeyrac can't help but notice and agree.
From then on, whenever someone comments on Jehan's bizarre wardrobe, he tells them that they just don't understand color the way he does, and the Independents soon adopt this answer when asked about his way of dressing by anyone outside of the group.
They may be a bunch of angry, pretentious, middle-class muckety-mucks, but they protect their own. The only thing that they all have in common is their unswerving loyalty to each other.