What are the requirements for a korean girl to like non-korean guy?

i'm mixed chinese/colombia guy 24 yrsold. and i'm been lately into korean girls tho. but they seem not too interested in me. i notice that they most likely like to stick with their own people instead. by the way, youth korean wearing is hot and highly fashionable. do you think does wearing style has to do with korean attraction, so they most likely into you?? just wondering uhmmm...any korean who wants to share their point of view??