The goal is to be able to differentiate them from real weapons.
The measure was prompted by a pair of officer-involved shootings three years ago.
Councilman Bernard Parks questioned the measure saying it could offer a false sense of security to officers and possibly put their lives at risk.
"What I'm concerned about and even in the report it says it may prevent a future officer involved shooting, but, on the other hand, it may cause a major injury or death to law enforcement," said Parks. "In my judgment, I don't know if I think that's a proper balance."
Despite Parks' argument, the L.A. City Council voted 14 to 1 to have the L.A. City Attorney's Office draft the measure. It would apply only in the city of Los Angeles.