DayZ field wiki · Crew
Armbands
A colour is a gospel
Short answer
Armbands mark a friend. Or a liar. Agree the colour.
Also: armband
How it works
Armbands exist so you can see a teammate. They also exist so someone can fake one.
What to do
Pick a colour at spawn. Still talk.
Don't
Don't treat a colour as a forcefield.