Litmus Green are an American hardcore punk band from Southern California, United States, who played from 1991-2002 and 2009–2017.

The Litmus Green formed in 1991 from the remnants of a band called Media Children, in which Rev.

Litmus Green played what was thought would be the "last" show in October 2002, with Ron Martinez (Final Conflict, 46 Short) filling in on bass, at the Showcase Theatre in Corona, CA.

Nick (Jack’s Cold Sweat and an old Litmus roadie) joined on bass in mid 2010.

In early 2013, Rick decided to hang up the drum sticks and Antonio Val joined as drummer that July.