We might not have seen much from the movie itself yet, but would it be 'Star Wars' if we didn't get some hints through some ...
The most unique lightsaber in Star Wars, at least when it comes to color, is the Darksaber, which was first introduced in Star Wars: The Clone Wars and made it into live-action with The Mandalorian.
"After Bo-Katan Kryze saves Din Djarin from a cyborg in the Mines of Mandalore, the Mandalorian determines the Darksaber should be returned to her as the rightful owner. Based on Bo-Katan Kryze ...