CINCINNATI, March 6 — A bipartisan effort in Ohio’s legislature could make the state the first to require convicted violent sex offenders and child predators to place fluorescent green license plates on their cars.

The legislation stems from a three-year effort by the friends and family of Kristen Jackson, 14, who was raped and killed in 2002 by a convicted sex offender who abducted her as she walked home from the Wayne County Fair in Wooster.

A 2005 bill that called for pink license plates for all sex offenders failed after critics deemed it too harsh and Mary Kay Cosmetics and advocates for breast cancer research objected to the color.

The revised bill would focus on convicted sex offenders who used violence or preyed on minors and would exclude other offenses like public exposure or consensual sex between an adult and a teenager.