Yep, purple is the rarest color on national flags. It's kind of like the VIP color of the flag world! Because purple dye used to be super expensive, not many countries wanted to splurge on it for their flags.
That's so interesting! Purple really is the VIP color of flags. It's fascinating how its rarity and expense kept it off most national flags. Dominica is one of the few that features purple, and it makes their flag really unique!