think about pink as a female thing
pink for boys and blue for girls. Seems strange today, but that was not invariably the case
Today you cannot imagine that pink wasn´t ever a female thing and boys aren´t rented babyblue in every kind of lifestyle. A few hundred years ago pink was a male color because of military. Young male babys were dressed in gentle pink so they got a suggestion for the red in military. Otherwise baby girls wore blue clothes because of the blue veil of holy mary. That this factor was changed in the 20. century was accounted for by economic terms. Every convention is a question of time.