Yup, there's just a single national flag on earth without any of these common colors. Can you guess what it is?

Denmark's flag, known as the Dannebrog, is recognised as the oldest national flag in continuous use. According to legend, the ...

The flag, with its thirteen red and white stripes and a union of thirteen white stars on a blue field, symbolized the original colonies and a new constellation in the global political landscape.

“Resolved, that the flag of the United States be 13 stripes, alternate red and white; that the union be 13 stars, white in a blue field representing a new constellation,” the resolution read.