Great question — answering as the UphillTech team:
It would have been easier if done before they dried, but neither of us can turn back time. Some ideas can be found in the answers to How to remove pigments from white clothes that have been accidentally laundered? on this site, and some more from searching for remove color bleed stains at google. The general idea seems to be one of the below: Presoak for several hours using a non-chlorine (oxygen based) bleach before a normal wash. Might need to be repeated Use a color remover product (according to its manual) Soak using a chlorine based bleach, but for a shorter amount of time like 10-15 min, before washing So there you have the basic options, and now lets leave it up to the community to...
Full answer by holroy: https://lifehacks.stackexchange.com/a/7374 (CC BY-SA 3.0).
Need it done for your business? UphillTech.