A graphic showing the color schemes to indicate the various types of prisoners in concentration camps. The colors are as follows:
Red: Political Prisoners. If the triangle is inverted, then the person was a POW.
Green: Professional criminals.
Blue: Migrants forced to perform forced labor.
Purple: Primarily assigned to Jehovah’s Witnesses, but could also designate members of other undesirable religious organizations.
Black: People with asocial elements such as alcoholics, drug users, the mentally ill, pacifists, etc.
Pink: Sex offenders, usually used to designate homosexuals.
Jews would be assigned a yellow triangle under the other one so that their emblems would resemble the Star of David.
Oftentimes the triangles would also bear a letter on them so as to indicate the prisoner’s nationality. For instance, a Polish person would have a P in their triangle, a French person would have had an F, etc.
Repeat offenders were given a band of the same color above their triangle in the following manner:
People in the penal battalions had a dot within a circle under their triangle, like this:
Someone who had previously attempted to escape would be given a similar emblem, but with a red dot instead of a black one. Above their triangles, people would also have their inmate number above their triangles. Putting it all together, a prisoner in a concentration camp might have worn something like this.
The person wearing this would have been a Jewish professional criminal, a repeat offender who had tried to escape previously and who had fought in the penal battalions.