Orachrysops niobe, or the Brenton blue butterfly is a species of butterfly in the Lycaenidae family. It is endemic to South Africa. The wingspan is 24–38 mm for males and 22–42 mm for females. Adults are on wing from October to November and from February to March. There are two generations per year. The larvae of the first two instars feed on the leaves and later instars on the rootstock of Indigofera erecta. The larvae can be found in holes at the base of their host plant. They are attended to by Camponotus baynei ants.