How come blue is the color of melancholy?

 Today my study of Bluets has led me home – Edvard Munch, Melankoli (Melancholy), oil on canvas, 1892 © National Gallery, Oslo As with many of Edvard Munch‘s works, “Melancholy” appears in several different versions and techniques. (His repeated use of the same concepts has made it difficult to identify some works due to the lack of…