In Latin America there have been a lot of "race mixing" we all have european, black and native blood so our fenotype isn't unique, there are a lot of people with dark hair and skin but take me for example, I don't have any european ancestors until my great-grandparents and yet I'm blonde and very white, I have "black" friends, "native" friends but we all know we are product of a mix.
The thing in Europe is that older generation are mostly caucasian while inmigration will have the same effect it had in America but not as extreme as it was here.
Máxima is quite white but she's like everyone else here product of a mix, she doesn't look darker than europeans but her native blood is still there and she should feel proud as I do of her origins.
I've given my two cents here, any questions?