Blue hair

Some people (typically of East Asian descent) are born with black hair that is so dark that it appears to have a metallic blue luster.

In Japan, the beauty ideal for a woman is to have glossy "blue-black" hair,[2] and Western foreign observers have also held this quality in high regard.

[3] The 18th-century English politician Charles Fox was a fashionable macaroni in his youth and tinted his hair with blue powder.

[9][10] In the 2007 fall fashion season, designers such as Marc Jacobs and Duckie Brown dyed the hair of their models blue to give them a shocking punk look.

[11] In 2011, the blue rinse became fashionable again and exemplars included Kate Bosworth with a dip-dyed style of turquoise tips while Thakoon Panichgul continued to present models with startling, all-blue hair.

First coined by users of 4chan, itself often associated with the alt-right, conservatives in the US began using "blue-haired liberals" as a taunt towards those who have "blue hair and pronouns".

Blue hair has been described as a "sacred aesthetic" in ancient Egypt and Mesopotamia, where lapis lazuli was used in funerary art and statuary.

[27] In some works by Homer, characters are said to have dark blue (kyaneos) hair or eyebrows when they are angry or in an emotionally intense state.

[33] Color in ancient countries (Greece and Egypt) were also more expressive rather than natural: blue or gold indicated divinity due to its unnatural appearance and association with precious materials.

[37] Musicians Loredana Bertè, Ashnikko, Katy Perry, Lady Gaga, Halsey, and Alissa White-Gluz have dyed their hair blue alongside female rappers such as Latto.

2-D, the fictional singer of the British virtual band, Gorillaz has natural blue hair caused by a head injury after he fell out of a tree as a child.