Three weeks later...
I totally forgot to let you know that, YES, I was able to remove the Bali green from my hair.
It was a two-part process:
1. Vinegar and lemon juice.
2. You'll have to wait for part two.
That's right, friends: it's more wait-time for the ridiculously drawn-out saga of the green hair fiasco.
Part two will be fun. You'll see. I'll try not to take three more weeks with this one.