It’s a code to indicate the amount of water that particular hydrant will provide. Glidden high hiden white enamel hydrant enamel yellow #48y38: Fire Hydrant Colors Henderson Water Utility Use following color code for field coating of hydrant bonnet to indicate size of water line supplying hydrant: Fire hydrant color code white . They are easy to recognize and as fire crews travel the streets performing their various duties, they see these. These color codes help emergency responders know about potential health, fire, and chemical instability issues. What color are fire hydrants? City hydrant standard colour is yellow. The following equipment/fixtures/fittings for the fire protection systems shall be painted in red. While these colors may communicate information according to a local system, they would not be. First, colors give firefighters and other professionals instant information about the unit’s status and water flow; Of a fire hydrant is commonly painted whit...