I recently dyed my hair and the next day it had hints of green in it!!
I was desperate, and would try anything. So I heard that putting ketchup in your hair and leaving on for about 20 minutes with a plastic bag or saran wrap over top of it, would take the green out. As crazy as it may sound, I thought, why not? So today I tried it, and it really does work. My hair may have a bit of a ketchupy smell, but no more green!!!!