Means they're not critical.
priority 1 or "Red" Triage tag code (meaning first priority for treatment and transportation).
Priority 2 (Yellow) Moderate to serious injury/illness (not immediately life-threatening) Victims with potentially serious (but not immediately life-threatening) injuries (such as fractures) are assigned a priority 2 or "Yellow" (meaning second priority for treatment and transportation) Triage tag code.
Priority 3 (Green) "Walking-wounded" Victims who are not seriously injured, are quickly triaged and tagged as "walking wounded", and a priority 3 or "green" classification (meaning delayed treatment/transportation). Generally, the walking wounded are escorted to a staging area out of the "hot zone" to await delayed evaluation and transportation.
NON-PRIORITY VICTIMS: Priority 4 (Blue) Those victims with critical and potentially fatal injuries or illness are coded priority 4 or "Blue" indicating no treatment or transportation. It is important to note that victims of mass casualty incidents (MCI) who are still presenting some vital signs but may have life-threatening or potentially fatal injuries, may be classified as "unsalvageable" by the Triage officer. Although this is a very difficult decision, it is necessary when many casualties require more resources than may be available. It is axiomatic that committing resources to save the life of a person who is most likely to live if cared for promptly, outweighs committing resources to victims who probably will not survive even if such resources are administered. In ordinary emergencies where only a few victims are injured, it is possible for responders to devote sufficient resources to critically injured patients, and to attempt to save their lives by extraordinary medical support and rapid transportation (when possible) to a level 1 or 2 Trauma Center. Such patients often still succumb to their injuries, even after extensive care in hospitals.
Priority V (Black) Victims who are found to be clearly deceased at the scene with no vital signs and/or obviously fatal injuries are classified as deceased or priority 5 (Black) in the triage coding system.