No, mailbox flags do not have to be red in order to be effective. The purpose of a mailbox flag is to indicate to the postal carrier that there is outgoing mail to be picked up. The color of the flag is not a requirement for its functionality.
So you can find them in the snow.
Both countries flags have the same horizontal colors: yellow, blue and red, in the same order
The flags are red and yellow
red
They are rectangular and have red and white in them.
Flags with red in them are common and often symbolize courage, strength, and valor. Some well-known flags with red include the flags of the United States, China, Japan, and Spain. Red can represent various meanings depending on the context and culture of the country.
Current German Flag is the Black/Red and Gold (Yellow) striped flag.
YELLOW and RED
The NFL penalty flags were never red. They were white. They changed the flags from white to yellow in 1965.
Red
Red.
YELLOW and RED