Bi’an Yingqing: misty blue of pure land. 
 
Bi'an (彼岸) literally means the other shore，in Buddhism to reach the other shore refers to arrive at the pure land, which is the celestial realm or pure abode of a buddha/bodhisattva.
 
Yingqing (影青), the misty blue,  is one of the colors of the celadon, developed in the Song dynasty (10th-13th century).