Male upperside is brownish black with white cilia. A broad broad pale blue discal band extending from costa to near apex of vein 1. Hind wing uniform without markings. Underside pinkish buff, with the following dark brown lines crossing both fore and hind wing.
The Koh-i-noor ranges from in India from Sikkim to Assam and onto Myanmar. The butterfly has a wide range in Southeast Asia, from Malaysia to the Indonesian Archipelago (Sumatra, Borneo, Enggano and Java) and the Philippines (Leyte, Samar, Panaon, Negros and Mindanao).
This large butterfly was perched near the roof in the canteen at Cat Tien National Park.