The flag was designed in July 2013 by Morgan Carpenter of Intersex Human Rights Australia
(then Organisation Intersex International Australia
) to create a flag “that is not derivative, yet firmly rooted in meaning”. Yellow and purple were chosen as colours because they are considered free of gender associations and have been used in the past to represent intersex people. The circle is described as “unbroken and unadorned, a symbol of wholeness and completeness and of our possibilities”.
The organisation describes it as freely available “for use by any inter person or organisation who wishes to use it in a human rights affirming community context”.
In 2021, the Inter flag was incorporated into Progress Pride’s version of the Rainbow Pride flag by Valentino Vecchietti of Intersex Equality Rights UK.