Why does marguerite consider herself ugly

Maya recalls an Easter Sunday at the Colored Methodist Episcopal Church in Arkansas. Her mother makes her a special Easter dress from lavender taffeta, and Maya thinks the dress will make her look like the blond-haired blue-eyed movie star that she wishes, deep down, to be. But, the dress turns out to be drab and ugly, as Maya laments that she is black, and unattractive as well.