Why is it called the blue period?

The term "Blue Period" refers to a phase in Pablo Picasso's artistic career, roughly from 1901 to 1904, characterized by a predominantly blue color palette. This phase emerged following the suicide of Picasso's close friend, Carlos Casagemas, and reflects themes of melancholy, poverty, and social isolation. The somber blue tones and emotional depth in his works during this time convey a profound sense of sadness and introspection.