Pink triangle and the LGBT rights movement. In Nazi concentration camps, each prisoner was required to wear a downward-pointing, equilateral triangular cloth badge on their chest, the color of which identified the reason for their imprisonment. Early on, homosexual male prisoners were variously identified with a green triangle (indicating criminals) or red triangle (political prisoners), the number "175" (referring to Paragraph 175, the section of the German penal code criminalizing homosexual activity), or the letter "A" (which stood for "Arschficker", literally "ass fucker"). Later, the use of a pink triangle was established for prisoners identified as homosexual men, which also included bisexual
Pink triangle of "genocidal" homophobia in slowing progress on medical research, adopted an upward-pointing pink triangle on a black field along with the slogan "SILENCE = DEATH" as its logo. Some use the triangle in this orientation as a specific "reversal" of its usage by the Nazis. The Pink Panthers Movement in Denver, Colorado adopted a pink triangle with clawed panther print logo, adapted from the original Pink Panthers Patrol in New York City. In the 1990s, a pink triangle enclosed in a green circle came to be commonly used as a symbol identifying "safe spaces" for LGBT people at work or