Purple. Only one person in canon wields a purple blade: the Jedi Council's Mace Windu.
Without a doubt, the most notable Jedi with a purple saber is Mace Windu, portrayed in the prequel trilogy by Samuel L. Jackson. Audiences first got a glimpse of the unusual blade in Episode II: Attack of the Clones, making Windu the coolest Jedi in one cinematic moment.
Purple is a rare lightsaber color that is usually only seen in characters who do not conform to the status quo. One such famous user of a purple lightsaber is the Jedi council member Mace Windu. There are several other examples of purple lightsabers in Star Wars Legends, including Anakin Solo, Jaina Solo, and Revan.
In canon only Mace Windu received a purple lightsaber but in Legends many Jedi had purple, violet and magenta lightsabers. In canon, Samuel L Jackson was offered the role of Mace Windu, Jackson personally asked Lucas if his light saber could be purple.
While blue, red, and green lightsaber crystals are the most common colors in the Star Wars universe, purple lightsabers are less often seen, and these exceedingly rare crystals were used by few duelists throughout history. Jedi are most commonly seen with the purple lightsaber.
Black is the rarest lightsaber color in the world of Star Wars. For a while, the only known black lightsaber was the Darksaber, forged a thousand years ago and owned by a Mandalorian Jedi. However, the High Republic era revealed that at least one more Jedi had a black lightsaber.
Kylo Ren, the dark side persona of Ben Solo, altered his lightsaber to suit his new preferences as a dark Force-user, changing his Jedi weapon into a red-bladed Sith lightsaber.
Leia's lightsaber was a blue-bladed lightsaber used by Princess Leia Organa during her time as a Jedi Padawan training under her brother Jedi Knight Luke Skywalker.
You may be looking for the Skywalker lightsaber or Leia's lightsaber, two other lightsabers used by Rey. Rey's lightsaber was a yellow-bladed lightsaber that was constructed by the Jedi Rey Skywalker following the First Order-Resistance War.
Tenel Ka Djo, the Princess of Hapes, had a tiara of rainbow gems worth the price of an entire solar system. She used some of the crystals in her second lightsaber, after her first one malfunctioned and led to the loss of her arm.
A crystal embodies the Jedi as the heart of the lightsaber, and pure kyber has no color until it's bonded to the Force user. This process likely resulted in Rey Skywalker's lightsaber being yellow.
Behind the scenes
The lightsaber's amethyst color was chosen by the actor portraying Windu, Samuel L. Jackson, who wanted a purple lightsaber because he was "the second baddest Jedi in the universe" and so he could find himself among the many Jedi featured in the Battle of Geonosis scene.
Yoda™ and Luke Skywalker™ classically have green lightsabers. Green implies a strong connection to the Light Side of the force. Anakin Skywalker™ and Obi-Wan Kenobi™ have blue lightsabers, due to their focus on fighting.
In the final moments of The Rise of Skywalker, Rey ignites her new lightsaber and reveals its yellow blade. We don't know where she got that kyber crystal, but her color choice lines up with her being the new guardian of the Jedi traditions.
Luke Skywalker's lightsaber was originally pink in the original Star Wars comics. Obi-Wan Kenobi and Darth Vader both used pink lightsabers in their war against each other. Pink lightsabers have a greater frequency in comparison to the other common colors of lightsabers, making them more powerful.
Luke Skywalker's lightsaber was changed from blue to green when they were filming because it was difficult to see. This became apparent during act one of Return of the Jedi when the battle on Jabba the Hutt's sail barge was shot during the day. The blue lightsaber blended in with the clear blue sky.
The Skywalker lightsaber, also known at various times as Anakin's, Luke's, and Rey's lightsaber, was a blue-bladed Jedi lightsaber constructed by Anakin Skywalker—Jedi Knight and prophesied Chosen One of the Force—during the final years of the Republic Era.
Even though Kylo Ren uses a red lightsaber, harnesses the dark side of the Force, and wears a cape, he is not a Sith. Because of that, he can never hold the title of Darth. Instead, he was just a chaotic mess of the dark side (until he eventually found his way back to the light).
This single-bladed turquoise lightsaber was used by Tenel Ka Djo, a member of Luke Skywalker's New Jedi Order. It was built in 23 ABY on the fourth moon of Yavin Prime, and the second of two very similar weapons.
Red lightsabers are the weakest, according to a Star Wars study conducted at the University of Leicester regarding lightsaber colors. Decades of Star Wars lore has dictated that the red lightsabers favored by The Sith offered greater offensive capabilities than the softer colors favored by The Jedi.
Arguably, some of the rarest types of Jedi were the so-called Iron Knights. These are members of the Shards species - crystals with a brain of their own.