What does blue sadness mean?

1, Blue Melancholy is a song by Richie Jen Leslie Cheung. There is also a song called Blue Melancholy. 2. Blue was originally a color with melancholy characteristics. It conveys the meaning of melancholy in color expression, and the blue melancholy conveys the overall melancholy feeling. Maybe everyone will think of the sky and the sea when they see blue, because the blue of the sky is the blue of the sea! Blue is also a kind of mood, sometimes open-minded, invisible, sometimes melancholy and unpredictable! Just like love, the sea loves the sky just like the sky loves the sea, but they can only express their love for each other by distance, and so do their hearts. Although I don't know how to describe my love for a person, I think love must be higher than the sky, and true love is when it is deeper than the sea! Sometimes I don't know the taste of lovesickness because I'm not around! Only in my heart can I have that kind of melancholy mood that seems melancholy but can't be expressed! 3. The period from1992 to 1995 is "Picasso's blue period", commonly known as "Picasso's blue melancholy". Blue Melancholy is the name of a mobile phone forum.