I just dyed my hair brown from a dark blonde and it turned green! What are good at home DIY reds to cancel out the green other then a tomato wash of lemon?

You can also use tea. Its natural. Boil tea till it becomes darkest brown and then put it in your hair, keep it for at least 30 min, then wash it may cause stain if you dropped on clothes so be careful. This is not going to have permanent coloring but its good for 3 to 4 days, and also its natural. You can also Google about it to know how to use it in hair.