Giorno della Memoria - L'Arcobaleno dell'odio

The most common forms of the badge were:

Red triangle: political prisoners (Social Democrats, Communists, Freemasons, anarchists - some anarchists were also given the black triangle - and other "enemies of the state").
Green triangle: "habitual criminals".
Blue triangle: Foreign Forced Laborers
Pink triangle: homosexual men and other sexual offenders.
Purple triangle: religious dissenters (Jehovah's Witnesses, Bible Student movement members, Quakers, Seventh-Day Adventists)
Black Triangle: so-called "Asocial elements" (Roma and Sinti - later given the Brown Triangle -, mentally retarded, alcoholics, vagrants, the habitually "work-shy", or prostitutes[1][2], some anarchists).
Double triangles: two superimposed triangles forming a Star of David: ATwo superimposed yellow triangles: a Jew, by practice or descent.
Red inverted triangle superimposed upon a yellow one: a Jewish political prisoner.
Green inverted triangle upon a yellow one: a Jewish "habitual criminal".
Pink inverted triangle superimposed upon a yellow one, making the Star of David: a Jewish homosexual.
Yellow triangle superimposed over a black inverted triangle, or "voided" black inverted triangle superimposed over a yellow triangle: an Aryan convicted of miscegenation and labeled as a "race defiler".

There were many markings and combinations. A prisoner would typically have at least two, and possibly more than six.