Isso é Island City , um filme de TV feito em 1994.
In the future, humanity develops a "fountain of youth" drug, but as many people around the world begin to take it, most begin to mutate into a barbaric proto-humanoid state.
Citizens of the city wore a colored crystal on their sternum and could only mate with other citizens of the same color, which was based on the individual's genetic makeup. Progeny that resulted from breeding outside of your prescribed color would have the genetic mutation that, when combined with the "fountain of youth" drug, created the race of proto-humanoids.
Você pode assistir ao filme completo aqui;