Lightsabers don't automatically turn red when one turns to the dark side. Anakin never bled his kyber crystal in the prequels, explaining why his saber stayed blue. Anakin's lightsaber needed to ...

In its original Legends-era incarnation, Darth Vader powered his weapon with a red synthetic lightsaber crystal, while the modern canon has him corrupt a Jedi Kyber crystal. Fascinatingly ...

a person can “bleed” their hatred into a kyber crystal – which are, by nature, linked to the Light Side of the Force. When Variety asked if Jod’s lightsaber not turning red suggested that ...