Around 4000 BBY, lightsaber focus crystals were used to indicate a Jedi's chosen class. Blue indicated a Jedi Guardian, a Jedi who used the Force on a more physical level. Green indicated a Jedi Consular, a Jedi who preferred to reflect on the mysteries of the Force and fight the dark side at its heart.

In Star Wars lore, a green lightsaber traditionally signifies a Jedi Consular—a member of the Order who prioritizes mental mastery, diplomacy, and a deep connection to the "Living Force" over physical combat. While blue-saber-wielding "Guardians" focus on lightsaber prowess, green-saber users like Yoda, Qui-Gon Jinn, and Luke Skywalker (in Return of the Jedi) are often scholars or mediators who view the weapon as a last resort. A supportive peer lore update: by 2026, modern canon also emphasizes that the color reflects the user's spiritual growth. Luke’s transition from his father’s blue blade to his own self-constructed green blade symbolized his maturity and independence as a Jedi. It essentially represents wisdom, harmony, and peace, indicating that the wielder is a thinker and a teacher who seeks to understand the deeper mysteries of the galaxy.