4. The Mets Colors are Derived from Two Defunct NYC Teams
The Mets were created in 1962 to replace the New York Giants baseball team and The Dodgers. Both teams left for California in 1957 and 1959 respectively. The Mets hat (blue and orange) was conceived to honor these teams — the hat is dodger blue and orange logo is from the NY Giants. These colors are also official colors are of the City of New York, and you can see the orange and blue on the city flag.