What color border signifies that a passport is issued by the United States of America?

The color blue signifies that a passport is issued by the United States of America. This blue cover is an important identifier of U.S. passports, which are used for international travel and distinguish American travelers from those of other countries. Each country typically has a specific color for their passport, and for the U.S., the blue cover has become a recognizable symbol.

In contrast, other colors represent passports from different nations; for instance, many countries use green or red for their passports. The specific color coding helps to categorize and recognize the origin of a passport at a glance, aiding customs and immigration personnel in their processes. Understanding this distinction is vital for identifying valid travel documents effectively.