First and foremost, this story is the heroic journey toward self-love by someone who has been systemically taught and reminded that she isn't worthy of love, either because of her race, or because of her skin-color (blue black) or because of her station in life. In time, she finds that her station is a reflection of the fact that people of her type are not celebrated.
However, that does not mean that she comes away feeling that there is nothing to celebrate. It's exactly this aspect of injustice that makes her transcendent sense of self-love so mysterious and heroic. See, when she was a girl, she felt as though she were supposed to ask the world how to feel about herself, and when she does, the world tells her that in every way, she's less than she should be. She's too blue, or too black, or not black enough. But in the end, the love that she thirsts for most is her own.
When she learns to love herself, she realizes that the truth is that her society is broken because of self-esteem issues. If more people were able to see their inherent worth, then they would not be oriented to compete with and hate one another.
The title of the book should be informed by this awareness. In this context, the title suggests that the real reason people mistreat black people is because powerful, beautiful people are often intimidating, making them the target for people's self-esteem issues.
