The National Fire Protection Association adopted the recommendation in the late 1970s, and Boston followed suit, making the switch on many of its vehicles. The color change didn't last very long.

DATES BACK TO THE 1970S. IT HAS BEEN 81 YEARS SINCE THE COCOANUT GROVE FIRE IN BOSTON. ON THE SOMBER ANNIVERSARY. OFFICIALS BROKE GROUND FOR A NEW MEMORIAL TO HONOR THE LIVES LOST FOR 190 PEOPLE ...