What color is the blue paper for sacrifice?

Porcelain green paper, also known as blue paper, blue paper, blue paper, green paper, green paper, blue paper, crow green paper and so on. , known as magnetic blue paper, is a gorgeous dyed paper from the Five Dynasties of Ming Dynasty to the Song Dynasty. Generally thicker, it can be uncovered layer by layer and dyed with indigo. Because the color is like the blue glaze of porcelain, it is called porcelain. Porcelain green paper, also known as magnetic green paper, is often listed with Xuande porcelain in Ming and Qing Dynasties as produced in Xuande period of Ming Dynasty (1426- 1435).