I would advise against it. In pictures it will be very easy to tell that you are wearing jeans, besides the fact that they are skinny, they would just look out of place. Perhaps a pair of loose black yoga pants could make a temporary stand in.
Rose Lalonde - Homestuck - [god tier] - 80%
Dave Strider - Homestuck - [red plush] - 0% & [doomed felt] - 0%
Davesprite - Homestuck - 0%
Gil Marverde - Ava's Demon - 80%