I think it was a very deliberate choice from the wardrobe department for Coco to wear a blue flannel as a symbolic way of showcasing she took Jemaine's spot in Bret's life.
rewatched the yoko episode and this frame in the show makes it even more obviousss. jemaine is literally trying to regain his status as the blue one. coco, girl, none of this was your fault I'm sorry.














