In the anime and manga series "Demon Slayer: Kimetsu no Yaiba," the character Giyu Tomioka wields a sword known as the "Nichirin Blade." Giyu's Nichirin Blade is depicted with a unique color that represents his abilities. Giyu's sword color is a shade of light teal or turquoise, often described as "water-like" due to his water-based Breathing Technique. The exact shade can vary slightly in different depictions, but it is consistently portrayed as a light bluish-green color.