Green and red food dyes are the hardest colour to remove - I had to replace some carpet a couple of years ago from the stuff.

Hopefully Rouge will see this cos she is the stain Goddess herself.

Will the fabric allow it to be soaked? If you google it they suggest adding white vinegar to the mix. However they also suggest ammonia - which is not something you want to try if it's a colour.

What about some dye-away stuff from the laundry aisle at the supermarket?