Dear Friends, Nice discussion. Let me write a few points.
Color coding is not available anywhere internationally. Each company makes its choice based on the recommendation of HSE/Security and Administration. However, from the point of ergonomics, the following points are guidelines for selectors.
In the man-machine-environment system, we learn that man responds to a given stimulus. For many situations, a generalized response is given. For example, most Indians expect a light switch to be turned by flipping the switch "down" and off by an "up" movement, while most Americans expect the opposite. A clockwise motion generally refers to an increase. These responses are called "population stereotypes," common behavior responses shared by nearly everyone in the population.
In occupational safety, population stereotypes are particularly important for hazard identification and recognition through various warning systems. Ideally, a visual or auditory warning system should utilize known associations for words (Danger, Caution, and Warning) and colors (red, yellow, green, blue) to specify the degree of hazard associated with a specific industrial condition. Research has shown that workers associate different degrees of hazard with various visual hazard alert cues. For instance, danger signs (color coded red) elicit a higher level of hazard association than caution signs (color coded yellow). Similarly, THINK signs (color coded green) elicit a higher level of hazard association than NOTICE signs (color coded blue).
It can be very useful to use different colors or helmet shapes to identify the category of personnel on the site (construction site, plants, etc.). This differentiation can be important for security and internal organization to easily distinguish between production workers and operators, supervisors, plant/department managers, security officers, maintenance technicians, emergency personnel, etc. Helmets can also be customized with logos or stickers for easier identification.
The Clue:
1. Fire extinguishers, fire warnings, etc., are red. What color helmet would you choose for a firefighter's helmet?
2. Green cross, green triangle, etc., are safety logos internationally. What color would you prefer for helmets for safety staff?
It is up to your company to choose the colors based on recommendations from respective departments. Do you have a say in it as a safetyman?
Ref: A.P.M. For Industrial Operations
Regards,
Kesava Pillai