If you are in Brazil, it is EASY! Right now, as I write this, there are TENS OF THOUSANDS of hookers in Rio. I promise, many of them are blue-eyed Russians, brown eyed Thais, and even American girls from Las Vegas.
Simply pay them to have sex with you, and tell them you want them to be your girlfriend. They'll do it for a price.
I've seen gorgeous brazilian women with light eyes! I'm argentinian and there are many girls like that here we also have some kind of "china town" but I think they date amongst their own, not sure tho plus you can speak portunhol since el portugues es semejante al español 😛