Star Wars: What Do the Lightsaber Colours Mean?
The Star Wars Lightsaber Colours, Explained
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Green lightsabers have typically been used by older and wiser Jedi like Yoda and Qui-Gon Jinn, who have an especially strong connection to the Force. They were once used by the Jedi Consular class, who preferred negotiation instead of fighting and would use their lightsabers only when necessary. They were also passionate about studying the inner workings of the Force.