How do I remov grass stains from white leather shoes?

I have bought a pair of Nike Air zoom Infitrator. They look like Air Force 1's. The material is made of synthetic leather. I somehow got grass stains on it. I scrubbed it with a paper towel and the initial mark is gone. There is still a greenish thing that I cant scrub off. Is there any solution to remove the greenish discoloration without damaging the shoe?

How do I remov grass stains from white leather shoes?
Water down a drop of color bleach! I do it all of the time



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