616 Kitty's notorious for having no sense of fashion, lol. It's why most of her costumes have been based on the standard 1960s suits (her original one was literally the same as Jean's first costume, and several later ones were similar, just without the cowl). The only major deviations from the blue and gold look was her Excalibur era Shadowcat suit, which would now be considered dated, the costumes she wore in Guardians of the Galaxy, one of which was just a copy of Star-Lord's and the other very shortlived, and then her current Marauders outfit, which was Emma Frost's idea. They used to be enemies, but now the White Queen has taken the former fashion disaster under her wing.