In his original idea for Lightsabers, the blue ones were the good guys and the red ones were the bad guys.
When Return of the Jedi came out he had to make the decision to give Luke a green lightsaber to make it visible against Tatooine’s sky. So he amended his original idea to also include green for the good guys.
Thos stayed that way, despite so many comics and other materials adding different colours, until Samuel L. Jackson begged him for a purple lightsaber. Essentially, to Lucas, the expanded universe was never canon until he made parts of it canon through movie or animated media.
It conflicted with George Lucas.
In his original idea for Lightsabers, the blue ones were the good guys and the red ones were the bad guys.
When Return of the Jedi came out he had to make the decision to give Luke a green lightsaber to make it visible against Tatooine’s sky. So he amended his original idea to also include green for the good guys.
Thos stayed that way, despite so many comics and other materials adding different colours, until Samuel L. Jackson begged him for a purple lightsaber. Essentially, to Lucas, the expanded universe was never canon until he made parts of it canon through movie or animated media.
You can see George Lucas literally say “that’s just the way it works” right up to when purple was suggested.