Blue nylon yarn is commonly used in the creation of accessories, such as scarves, hats, and gloves, where its strength ensures the final product will be long-lasting and resistant to fraying. It is also a favored choice for items that need to withstand regular use or exposure to the elements, such as outdoor gear, bags, and sports accessories. The blue hue of the yarn can vary from a subtle pastel to a rich navy, allowing crafters to choose the shade that well suits their project.