alright, i'm kind of pushing past the boundary of characterization here, but these are still character details and i think true to the intent of the thread! dave's brother does not wear a polo shirt, karkat vantas does not wear a sweater. these are popular fan-interpretations of their outfits that made their way back into homestuck proper thru fan contributions. if you look at how andrew hussie drew the characters in panels, in flashes, in donation sketches, you can see pretty clearly that it wasn't their intent.

i'm making it sound like i'm hating here, but i don't even hate these ideas. it's just like, i want people to know they're headcanons is all. WE HAVE TO DRAW A LINE IN THE SAND, OKAY