I prefer to think that Green implies a certain amount of “earthy wisdom,” which *could* come from encountering the dark side but also from other sources: Yoda’s wisdom is obvious, Qui-Gon’s very down-to-Earth, Ahsoka had to learn how to be Anakin’s apprentice (), and Luke experienced the school-of-hard-knocks.

Blue implies a greater force of will in their personality: Obi-Wan’s focus and discipline showcase his will, while Anakin’s willful personality eventually caused problems. Ben Solo’s a weak will individual, but maybe he’s just so stupid that he got blue by default since there was no way he’d ever get green.

Yellow, purple, and white are simply highly unique variations that emerge from unique experiences. Mace is played by Samuel L. Jackson (enough said), Ahsoka arguably rose above the Jedi Order of her time, and Rey had her personality overwritten by the Force demanding she be in an abusive relationship for no good reason.