On Thu, 06 Mar 2014 18:58:36 -0500, wrote:

I once heard that green was the most visible color at night.
We are seeing more "chromium yellow" firetrucks, particularly in
rural areas. Red dissapears into fog and smoke in the dark while
Chromium Yellow stands out.

Locally our city fire trucks are still red.

I've seen these many times. I call it "Lime Green". You may see them
on airport runways.

Pic:

http://www.microkhan.com/wp-content/uploads/2010/09/Lime-Green-Fire-Truck.jpg