Theoretical emergency medical IDs. The idea was to have a medical ID on a person, with color indicating high risk patients. The red boarders would be the edges of the card, so if an individual were to become ill or injured in public a bystander could easily find their card. Blue colored cards are for people over the age of 18 and green is for anyone under 18. Red indicates the person has complicated medical history. The black bar on the back can be scanned by emergency vehicles to receive the patients medical history.