The rules do not say it is enough that your parents are Colombian to represent that country, but that other factors have to be fulfilled for that and I wonder which one is here
"In order to accept an artist who was not born, did not grow up or does not currently live in a country/region but only has roots from that country, then he/she must have special ties with that country (speaking and/or singing in the language of the country (no), addressing himself as a person from that country(I don´t think so)), being famous in that country(not especially), visiting that country often (don´t think so, but who knows it?), representing or trying to represent this country in ESC if it's a European country(no), and other factors). Having the citizenship of a country just because of someone's descent is not enough to qualify to represent that country (exactly). Moderators have the right to decide about the eligibility of an artist who lays in this category."
Can´t find the one, sorry