https://www.cnet.com/news/star-wars-lightsaber-colors-decoded/

As Solo: A Star Wars Story ends its theatrical run, it's safe to talk about the unexpected appearance of a lightsaber in a movie that didn't seem likely to have any. It popped up thanks to a surprising cameo by longtime Star Wars villain Maul, who ignited his red blade to threaten Emilia Clarke's Qi'ra.

Lightsabers have been cinematic icons and appeared in every Star Wars movie since 1977, when Luke Skywalker ignites the blue blade handed to him by Jedi Master Obi-Wan Kenobi in A New Hope. But the different colors aren't just arbitrary -- there's a reason behind Darth Vader's red blade, for instance. The variation led me to wonder about the different hues and what each character's color choice says about them.