It also depends a bit what you wear as a top and your general style of clothing and as well what kind of pants as besides it being black ... best thing to do (hehe ok...what I do) is to wear the clothes I have to find something matching to when I go to the store to test them out...
what kind of black is your jeans. like dark black or like faded or like midnight black or like navy black. maybe jet black, something like dark gre black. washed black