Well, Sri Jayawardenepura Kotte is the legislative capital and Colombo is the commercial and administrative capital and K0tte is a suburb of Colombo so you can say Colombo because in almost everywhere in the world, Colombo is thought to be the capital and even in google maps, it says Colombo. read more
Colombo is the largest city and commercial capital of Sri Lanka. It is located on the west coast of the island and adjacent to Sri Jayawardenepura Kotte, the capital city of Sri Lanka. Colombo is a busy and vibrant city with a mixture of modern life and colonial buildings and ruins and a city population of 647,100. read more