Everything about a firetruck makes us stop and look at it. They’re big, bright, loud, and they carry brave people who save lives. But have you ever wondered why they’re red? The answer isn’t 100% clear, but there are a few theories out there.

By the way, other colors have also been used for them. Studies have shown that while that red hue reaches our eyes first in the daytime, it’s not best for at night. When it’s dark out, our eyes are better at seeing colors with a smaller wavelength like greens and blues. So some cities have adopted one of these colors for their firetrucks instead of the traditional crimson! Other places have even more surprising colors like orange, pink, yellow, and lime green!

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