Listen to 8 Memories in Watercolor, Op. 1: No. 4. Blue Nun online. 8 Memories in Watercolor, Op. 1: No. 4. Blue Nun is an English language song and is sung by Susan Chan. 8 Memories in Watercolor, Op. 1: No. 4. Blue Nun, from the album Echoes of China, was released in the year 2015. The duration of the song is 1:28. Download English songs online from JioSaavn.