Seem to remember in the late 70's early 80's we had a roll of RED reflective tape on test. Never did hear the results. White tape was used on helmets when they were white and even on some silver 1A's.
Reflective tape was on Mk1A's in the late 60's
Slightly OT, the green helmet/LSJ was partially as a result of helicopter/fighter trials, where the prime aiming points in the helicopters were the white helmets and white gloves, plus one off-colour blade in the Wessex V gave it away from >5nm
3M introduced coloured relective tape in the early/mid 70's, IIRC, and the red stuff was highly prized to "individualise" one's bone dome
Back on topic, HiVis vests are mandatory for aircrew at many Oz airports, just another of those things which appear impossible to change
