So Toriyama designed Future Trunks’ blue haired look, and it was not changed. This even leads to some characters acting like he had always had blue hair, as sort of a hair retcon for the character.

Future Trunks retained this hair color when transitioning to the anime space. At the same time, his mother, Bulma, made her blue-haired anime debut in Dragon Ball years earlier — an odd choice ...

Goku and Vegeta have been on that list for years, but others are joining in at long last ... cosplay is Future Trunks’ sword, and cosplaynay reimagined the hero’s hair with blue-black braids.