Arhopala theba is a species of butterfly of the family Lycaenidae. It is found in the Philippines on the island of Mindanao.
Like Arhopala bazaloides, but much larger, the groundìcolour beneath, except before the tornus of the forewing, nowhere lighter, but quite dark chocolate, whereasthe markings are almost purely ivory-white. Above the male is of a wonderful morpho blue colour; a purple reflection on the costal portion, the costa and distal margin are rather broad black; hindwing with a broad black costa and a narrow black distal margin exhibiting dark internerval dots. Female above dark brown, basaland central areas blue.