How did the dodgers decide on the colors blue and white?

Answer 1

In the teams first years they were nicknamed the Brooklyn Bridegroms by the fans (7 of the teams players had gotten married over the offseason). The White in their uniform is called "Wedding Gown White" and the Blue is from the old wedding superstition "Something old, something new, something borrowed, and something BLUE!" So there you have it! Wedding gown white & borrowed blue. Go Dodgers!

Answer 2

after the Brooklyn dodgers and New York Giants left New York for the west coast there wasn't any New York team in the national league.when the mets were created they wanted to attract both old fan bases. the blue in the mets uniform represents the Brooklyn dodgers and the orange was to represent the New York giants.