What is the purple mood on the Internet?

The internet term "purple mood" has no fixed definition, but is more like a figurative expression, which is used to describe a person's depressed, melancholy or depressed state. As a color, purple is often endowed with mysterious, elegant and noble images, and when combined with the word "mood", it forms a unique emotional expression. Purple is a very unique color, located between red and blue in the spectrum, with a wavelength between 380 and 450 nanometers. Purple was a very rare color in ancient times. Because there are few purple substances in nature, purple is often regarded as a symbol of nobility in ancient times, representing nobility, mystery and romance.