If I have a black/blue, black/green, and black/brown football jig, is it okay to use just black/blue craws on all of them??

Yep.

sure is  when fishing jigs i try to stay with the same colors for my trailers as my jigs  but ive also caught fish with a brown jig and a blue traileer

I've seen fish caught on some of the most horrid looking color combinations imaginable.  Don't be afraid to experiment.