colors bleeding

[susanj65]

Our local school's colors are orange and black and I have aquired a lot of orange t-shirts.  In the process of washing, I apparently washed them with something navy blue or something because the dark has bled onto the orange.  PLEASE, does anyone know how to get something like that out?  Most stuff I see online is to get color out of white fabric, but what if you have orange with dark spots?!!!  HELP!!!