Portrait of Mary Benwell (fl.1761-1800) John Hoppner (1758-1810)

The picture has something of this: lid, people, veil, woman, portrait, costume, bonnet, wear, magic, fantasy, dress, girl, fashion, princess, Renaissance.
Perhaps it’s a close up of a painting of a woman wearing a white hat with a blue bow on top of her head and a blue ribbon around her neck.