Reader's Digest to the rescue! Below are the definitions of the common hospital codes that they published in their May 2012 issue (although codes can vary).
RED: fireActually, those all sound awful! Let's just hope and pray that we all only reference this guide because we hear them on tv!
BLUE: adult medical emergency
WHITE: pediatric medical emergency
PURPLE: child abduction
GRAY: combative person
SILVER: combative person with a weapon and/or hostage
YELLOW: bomb threat
PINK: infant abduction
ORANGE: hazardous-materials spill
BROWN: bed full of excrement