Marges full name is Marjorie Bouvier Simpson. The initial idea of what marges hair is so long is because the idea was have bunn ear under the hair.
Marge's hair isn't naturally blue,she has had grey hair since she was 17. Marge was born left handed and she has had numerous jobs.
She also has poor vision. Marge's hairstyle was inspired by the beehive style worn by Margaret Groening(Matt Groening the creators mother) in the 1960s.
Her pastel green dress and red shoes, along with the red beaded necklace, contribute to her calm and comforting aesthetic.