White: Totally unaware of your environment, a condition of unreadiness.
Yellow: Relaxed attention, you are aware of your surroundings.
Orange: Possible specific threat observed, begin to develop a plan.
Red: A deadly fight is quite probable, look for the cues to trip your mental trigger that will initiate your response.
Black: Under lethal attack.
HTH.
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How does it become a man to behave toward this American government to-day?
I answer, that he cannot without disgrace be associated with it.
--Thoreau, "Civil Disobedience"