>>149354950No, Marge Simpsonโs hair isnโt naturally blueโitโs dyed. According to the "Write Off This Episode" segment and reinforced in Season 34, sheโs been dyeing it since she was a teenager because her natural hair is gray. In the Season 22 episode "The Blue and the Gray," her stylist confirms her hair is naturally completely gray โsince she was 17,โ and the blue is a permanent dye job. Margeโs parents' hair is shown as blue and gray. However, the hair colors in flashbacks and comics suggest hair styling or dye, not natural color.
Patty's and Selma's gray hair comes from longโterm exposure to cigarette smoke and ash (not genetics).