Harry and Hermione were never stated to be white, it depends on how you read the book and what your own skin color is i guess. (Ron was decribed as pale i think. Still, there are black people who have naturally red hair and freckles. Look it up, theres quite a few pics on google)
Besides, is it bad to have black people…

You do know that Isabelle is latina and Magnus is Chinese? And are also both main characters? Im getting kind of annoyed at people who keep saying that the characters dont look exactly like how they imagined them to be in the books, like people do with valentine not being white haired. Find other reasons to bitch…