Alignment has three types of colors, blue, red and grey. They are gong to be introduced in the following ways.
When someone has good relationships with others of his own faction, the one’s color is blue. Attacking the one in blue will get penalties. Remember that blue one could be an enemy, which has nothing to do with whether or not he kill you with no risk.
Red represents that someone does not get along well with their own faction. This is normally because they kill people coming from their own faction. Red one can be attacked and attack others freely. They may or may not an enemy, which depends on.
Grey is someone who has gained criminal status by attacking a player coming from their own faction, race, or whatever. When they are in grey state, they can be attacked without penalty, but note this the grey only lasts for a short period of time.