"Colour" Codes

Code Black:
- In Australia code black is a personal threat. This incorporates a diverse range of situations including assaults, confrontations, hostage situations and threats of personal injury or attack
- Bomb Threat (Ontario, Manitoba)
- In the military code black is bomb threat or discovery of suspicious package.

Code Gray/Grey
- A combative person with no weapon under HASC suggestions.
- Severe Weather (Cook Children's Medical Center, Fort Worth, TX)

Code Green
-A combative person using physical force, especially weapons. (some American hospitals)
-Used to indicate an evacuation situation, and can refer to the evacuation of a ward/floor/wing or the entire hospital (Code Green - Stat) depending on the call (Ontario Hospital Emergency Codes, Winnipeg Regional Health Authority)

Code Pink
- Biohazardous contamination of a patient or staff. (Heartland Regional Medical Center)
- Patient is under influence of illegal substances (UK First Aid organisations)

Code Purple
- Australian Standard for Bomb or Substance alert
- Hostage situation or patient abduction (Ontario Hospital Association)
- Emergency department can no longer accept patients; divert incoming cases to other hospitals if at all possible (Canada, also Wellstar Health Group)

Code Silver
- Combative person with a Lethal Weapon (HASC recommendations).
- Violent Situation - Lockdown (Cook Children's Medical Center, Fort Worth, TX)

Code Yellow
- Missing patient (Ontario Hospital Emergency Codes).

Code Orange
- Used in Ontario hospitals to indicate an external disaster with mass casualties. Lockdown or controlled facility access is often used as part of the response. Volunteers, Families and Students were denied access during SARS Outbreak of 2003.

Code Brown
- Missing Adult (University of Toledo Medical Center) (University of Cincinnati Medical Center)