It's not just blacks and hispanics. It's a lot of other hues as well. And that's before asking what "black" and "hispanic" even mean, which is highly contextual to culture.
And anyways, "white" isn't even a color -- which is kind of obvious if you think about it for a second because a dark white person and a fair-skinned white person can be as far apart as a dark white person and a latino person. Rather, white is a collection of socio-economic attributes and their indicators, of which color and other physical indicators are only the most obvious/visible. And not all white people have always been white. See e.g. "How the Irish Became White".
And anyways, "white" isn't even a color -- which is kind of obvious if you think about it for a second because a dark white person and a fair-skinned white person can be as far apart as a dark white person and a latino person. Rather, white is a collection of socio-economic attributes and their indicators, of which color and other physical indicators are only the most obvious/visible. And not all white people have always been white. See e.g. "How the Irish Became White".