What to do with your black orphaned pants?
I recommend you leave them the length they are, as long as the properly fit you. This is so that you can roll them up to wear this fall with a super cute flat.
That way, if you desire to wear a short heel bootie this winter, you don't worry about having skin freezing/showing between the pant hem line, and the top of the bootie.
Plus, when you have a pant that goes with tons of items (sadly, except the cute boots above) then your not leaving the pants in the back of the closet while you go shopping for a better-not shortened to a capri length pant.
Here's a great example for rolling up pants (I do it 90% of the time) and LOVE it.
https://www.pinterest.com/pin/369435975659793866/