sadly the world bases everything on chitzoniyus so although there is nothing inherently wrong with wearing jeans, ppl view it as bad in the non modern orthodox frum community. however in other circles it is totally fine. But now that there is a bad association with wearing jeans i dont think u shud.
black jeans dont really have a bad association so there is nothing wrong with them
i never really understood why ppl are so obs3essed with jeans are they that comfortable??