Shape-cue legend
Never color alone. Every threat/status pairs its color with a distinct shape — diamond (hostile), bar (friendly), square (neutral), quatrefoil (unknown), triangle (caution/critical). Strip the color (Mono) and the meaning must survive.
HostileFriendlyNeutralUnknown
NominalCautionCritical
Proof: Mono with color stripped
Section titled “Proof: Mono with color stripped”