"Sri Jayawardenepura Kotte (Sinhala: ශ්රී ජයවර්ධනපුර කෝට්ටේ, Tamil: ஶ்ரீ ஜெயவர்த்தனபுரம் கோட்டை), also known as Kotte (Sinhala: කෝට්ටේ, Tamil: கோட்டை), is the parliament site of Sri Lanka. It is located beyond the Colombo city centre and is the official capital city of Sri Lanka.[1] It is a large suburb of Colombo city.
I know it's not coherent with the Standard JetPunk capitals, but considering Sri Kotte as the capital instead of Colombo isn't convincing to me. I may well be wrong, but the text you pasted confirms that it's just a suburb.