Light sabers are fictional energy weapons featured in the Star Wars universe. They consist of a hilt that emits a blade of plasma, which can cut through most materials. Light sabers are often associated with the Jedi and Sith, two opposing factions in the series, and are used in combat and training. The color of a light saber's blade can vary, with common colors including blue, green, and red. Each color often symbolizes different traits or affiliations. Light sabers are iconic elements of the Star Wars franchise, representing the struggle between good and evil.