In general, icon colors have the following meanings:
Green card
Red card
Action, condition
Berserker
Bleeding
Blinded
Charmed
Dazzled
Entangled
Enthralled
Fallen
Hit, condition
Poisoned
Scared
Stunned
Suffocating
Terrorized
Weapon restriction
Wounded, condition
Blue card
Not berserker
Not bleeding
Not blinded
Not charmed
Not dazzled
Not entangled
Not enthralled
Not fallen
Not hit, condition
Not poisoned
Not scared
Not stunned
Not suffocating
Not terrorized
Not wounded, condition