Blue calico, also known as blue printed cloth or blue and white fabric, is a type of traditional Chinese textile that features intricate patterns in shades of blue. The fabric is made using a technique known as wax resist dyeing, where wax is applied to certain areas of the fabric to create a pattern, and then the fabric is dipped in dye.

Blue calico has a rich history in China and was traditionally used to make clothing, bedding, and other household items. It was particularly popular in the Jiangnan region of China, which includes cities such as Suzhou and Shanghai.

Today, blue calico is still produced in China using traditional techniques, but it is also popular in other parts of the world as a decorative fabric. Its intricate patterns and shades of blue make it a versatile material that can be used for a variety of purposes, from clothing and accessories to home decor and upholstery.