Which hydrant color represents the highest available flow among the listed categories?

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Hydrant color coding is used to convey how much water a hydrant can deliver. In this system, colors are arranged so that higher-flow hydrants have distinct colors, making it quick to spot the best option at a glance. The light blue category is the highest among the colors listed, so a hydrant marked light blue can provide the most water. That’s why it’s the best choice when you need a large, fast water supply. The other colors—red, orange, and green—represent progressively lower flow levels, so they’re less capable for big or rapid-fire demands even though they may be adequate for smaller or slower incidents.