All of the Americas were colonized by European powers. From what I understand, interracial couples weren't really a thing in the US. Most mixed race people were the product of rape. As we all know, the US had many laws that prohibited interracial marriage. Blacks and whites and indigenous people were heavily segregated.

I notice that this changes as you go fur south. In the Caribbean, many people have mixed race ancestry. Black people from the Caribbean look distinctly different than Africans. The European population in these islands reigned "Supreme", but there were lots of instances of organic interracial relationships. It wasn't as taboo as in the US. Large numbers of Indian, Arabic and East Asian migrants joined the population as well.

In Central and South America the population is heavily mixed in a lot of areas. "mestizos" are people with mixed European and Indigenous ancestry. Many European men freely married into indigenous populations and vice versa. The catholic churches would have no problem marrying mixed race people. This is the case for most of South America. As you go further south, large segments of the population have African ancestry like in Brazil, Colombia and Ecuador.

By no means am I saying that society was perfect in these places. However it's interesting how these former European colonies have/had a more lax attitude towards interracial marriage compared to the United States