"Blue hair Barbie" is a collectible doll created by Mattel, Inc., featuring conventional Barbie with blue hair (noun). It was first released in 1973 as part of the "Malibu" line and has since become a popular and sought-after item among collectors.
Blue hair Barbie is significant because it represented a departure from typical blonde Barbie dolls and expanded the range of dolls available to consumers. It also showcased the growing acceptance of blue hair as a fashionable and stylish choice, particularly influential among teenage girls during that era.