Pseudonacaduba sichela, the African line blue, dusky line blue or dusky blue, is a butterfly of the family Lycaenidae. It is found in Africa, south of the Sahara.
The wingspan is 25âÂÂ28 mm for males and 25âÂÂ27 mm for females. Adults are on wing from October to May.
The larvae probably feed on Mundulea sericea.