Why is Mace Windu's Lightsaber Purple?

Mace Windu, a prominent Jedi Master in the Star Wars universe, wields a distinctive purple lightsaber. The reason for his unique lightsaber color is not extensively explained in the movies or official canon, but there's a story behind it.

The decision to give Mace Windu a purple lightsaber was actually a creative choice made by actor Samuel L. Jackson, who portrayed the character in the prequel trilogy. Jackson is a known Star Wars fan and he wanted his character to stand out more in the large-scale battles involving multiple Jedi.

During discussions with George Lucas, the creator of Star Wars, Jackson expressed his desire for a unique lightsaber color that would make Mace Windu easily recognisable on the screen. Lucas agreed to this request, and the purple lightsaber became Mace Windu's signature weapon. In the in-universe explanation, it's often said that the purple lightsaber crystal is a rare find, and its specific significance is not deeply explored within the movies themselves.

So, while there isn't an elaborate in-universe explanation for Mace Windu's purple lightsaber, the choice was ultimately a blend of creative collaboration between Samuel L. Jackson and George Lucas, along with the desire to make the character stand out visually in the Star Wars universe.