So every Link in every Zelda game isn't the same Link; it's different generations of Links, and some are probably not even related. Link's attire in this game is the Champion's tunic, made by Zelda for him, her, and the 4 champions all to match. In this game, blue is seen more as royalty or high status regarding these characters. The Champion's tunic cannot be dyed, unlike most of the outfits in the game, because of how special it is---considering Zelda made it herself 100 yrs ago. There are renditions of his usual outfit through amiibos, though, such as the Ocarina of Time Tunic and the Twilight Princess version also 😉
@@specie44 They're essentially figurines Nintendo originally made for Smash 4 that, when scanned, give you certain items and such in-game. There are ones specifically for Breath of the Wild also 😉