There isn't a canonical Jedi with a permanent rainbow lightsaber, but several Force users have multi-colored or shifting blades: Tenel Ka Djo used valuable rainbow gems in a lightsaber in Legends lore; Gantoris in the Jedi Academy books had iridescent flashes; and in games like Jedi: Survivor, the unlockable "Party Lightsaber" changes color with every swing, acting like a disco or rainbow saber.
Form VII (Juyo/Vaapad)
Considered the most aggressive and unpredictable disciplines and therefore the most controversial, it was a combat style with a history of the Jedi High Council of the Jedi Order forbidding it and later allowing only select users to practice the disciplines.
The rarest lightsaber color is generally considered black, embodied by the unique Mandalorian weapon known as the Darksaber, with only one ever created, though white (from purified red crystals) and purple (like Mace Windu's) are also exceptionally rare in canon, signifying unique Force attunements or powerful skills. Other rare shades include cyan, gold, and sometimes pink, depending on the specific canon or Legends source.
Tràkata is a rare and cunning lightsaber technique built on deception and misdirection. Jedi like Kao Cen Darach and Cal Kestis used it to gain surprise advantages in battle, while Sith like Qimir mastered its lethal precision.
In Star Wars lore, Order 37 was a grim Clone Trooper contingency plan to capture a wanted individual (often a Jedi) by taking a civilian population hostage, locking down the area, and threatening mass execution if the target wasn't surrendered, making it a horrific tactic used by the Empire to force Jedi compliance. It was considered more brutal than Order 66 because it targeted civilians directly, forcing Jedi to often turn themselves in to save innocent lives, as seen on planets like Bellassa.
So: which lightsaber is the most powerful? The answer depends on what you value most: the devastating raw power of Kylo Ren's unstable blade, the symbolic might of Anakin Skywalker's blue saber, the balance reflected in Rey's yellow lightsaber, or the legendary authority behind the Darksaber.
Form VII, known by its two primary disciplines of Juyo and Vaapad; and also known as The Ferocity Form, was the seventh form of lightsaber combat. It was considered the most aggressive and unpredictable form.
Jedi Battlemaster Cin Drallig and Grand Master Yoda had knowledge and mastery of all seven forms, including Juyo, befitting Drallig's role as lightsaber combat instructor at the Jedi Temple and Yoda's reputation of having mastered all forms of lightsaber combat as did Anoon Bondara, another lightsaber instructor.
Adi Gallia – Senior Member of the Jedi Council
Adi Gallia was a prominent member of the Jedi High Council. As one of the few female Jedi Masters on the Council during the final years of the Republic, Gallia played a central role in crucial decisions in the run-up to the Clone Wars.
Mara Jade, with her iconic magenta lightsaber, stands as a pivotal character in the Star Wars expanded universe.
The characters who wield 2 red lightsabers are Darth Maul, Asajj Ventress, Savage Opress, Komari Vosa, Dark Rey and the Grand Inquisitor. These characters are known for their unique fighting styles within the Star Wars universe, and their red lightsabers greatly add to this.
Form VII (Juyo), the "Ferocity Form," was banned by the Jedi Order because it required channeling aggression, anger, and other intense emotions to fuel its wild, relentless, and unpredictable attacks, which closely skirts the dark side and risks corrupting the user, a direct violation of the Jedi Code's emphasis on peace and emotional control, even though Mace Windu later adapted it into the controlled Vaapad variant for a select few.
Form VIII: Sokan. Sokan was a form of lightsaber combat. Developed by the ancient Jedi Knights during the Great Sith War, Sokan combined tactics that allowed for evasion and mobility with the kinetic motions of Form V combat.
Qimir's True Identity and Origins
“The Jedi like you might call me… Sith.” Before embracing the dark side, Qimir was a Jedi Padawan trained by Master Vernestra Rwoh, one of the most prominent Jedi of the High Republic era.
The clone commando RC-1136, known as Darman Skirata, got Jedi Knight Etain Tur-Mukan pregnant during the Clone Wars, resulting in their son, Venku Skirata, a Force-sensitive child born outside the Jedi Code's restrictions. Their forbidden relationship and child's birth were detailed in the Republic Commando novels, highlighting the complexities of clone troopers' development and the strictures of the Jedi Order, as Etain was killed shortly after Order 66 while protecting her family.
Order 66, also known as Clone Protocol 66, Protocol 66, or simply "the Order," was one of top-secret contingency orders that identified all Jedi as traitors to the Galactic Republic and, therefore, subject to summary execution by the Grand Army of the Republic.
BACKGROUND INFO: What is Order 69? Order 69(AKA "clean up") was the idea to kill the entire clone army in one sitting, leaving the Jedi defenseless and exposed by the sudden departure.