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USPS Color Requirements for Curbside Mailboxes: What You Should Know

Monday May 20, 2019

When purchasing curbside mailboxes for a neighborhood or residential community, you'll need to choose an appropriate color. The United States Postal Service (USPS) is pretty flexible regarding the color of curbside mailboxes, but there are still a few things you'll need to know. By complying with the USPS's color requirements, you can avoid the headache of having to replace or repaint your mailboxes in the future.

All Colors Are Supported

The USPS allows for the use of curbside mailboxes in any color. You can choose a traditional color like black, white or brown, or you can choose a more modern color like green, red or blue. There are currently no restrictions regarding the color of curbside mailboxes in the United States.

The Carrier Flag Cannot Be Green, Brown, Blue, Yellow or White

While the USPS doesn't require homeowners or property developers to use a specific color for their mailboxes, it does require the use of specific carrier flag colors. Under the USPS's requirements, the carrier flag on curbside mailboxes can be any color except green, brown, blue, yellow or white. Why can't you use a signal flag in one of these colors? They are typically the least visible when used with traditional curbside mailboxes, meaning mail couriers could fail to see a raised carrier flag if it's green, brown, blue, yellow or white.

Mailbox Color Must Contrast With Carrier Flag Color

You can choose any color for your curbside mailboxes, but it needs to contrast with the color of the carrier flag. In other words, you can't use a black mailbox with a dark gray or indigo carrier flag, nor can you use a red mailbox with a pink carrier flag. The color of your curbside mailboxes must contrast with their respective carrier flag. The purpose of using contrasting colors is to improve the visibility of the carrier flag. If features a similar shade or tone as the mailbox itself, mail couriers may not see it.

 

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