Her mom was a Tamil (south Indian). A pure Indian, no European about her. Tamils are usually fairly dark. I had quite a few Tamils working for me, for years.
The tech workforce is heavily oriented to south Indians, Tamils, Telugus, Kannadas (less of those).
Her mom, the Tamil, was quite accomplished. She was a physician and a cancer researcher at Berkeley. Kamala was quite an underachiever really, both her parents were much more intellectual people.
Also worked with lots of other Indian ethnicities, Sikhs, Rajasthanis (management types, they have a thing for it), Bengalis, etc.
I know Kamala went to Law School. But she is not that smart. You would think with her background, some of it would have rubbed off her. I guess not.