Direct Blue 6 is widely used as a dye in the textile industry for coloring cotton, linen, rayon, and other cellulosic fibers. It is particularly valued for its ability to produce deep, vibrant blue shades with good colorfastness. The dye is applied in processes such as exhaust dyeing and continuous dyeing, where it bonds directly to the fabric without the need for a mordant. Additionally, it finds use in paper dyeing, providing consistent and durable coloration to various types of paper products. Its stability and ease of application make it a popular choice in industries requiring reliable and long-lasting blue hues.