Purple Triangles Poster Purple Triangles Amazon » eBay » The film "Purple Triangles" is a 25 minute documentary from 1991.. Purple Triangles Details Title: Purple TrianglesYear: 1991Genres: DocumentaryDuration: 25m Rate this title Have you seen Purple Triangles? Rate it between 1 to 10 below. Log in to your account if you want to rate this title.