It was historical shoujou. The female MC had pink hair and left/disowned by her family thinking she was useless. Then she got close to a Duke family that is said to have Bad omen aroumd them (?) or something like they were an unlucky Family. The Duke family had BLACK hair. The MC has a sister with Red hair and is said to be cherished by the MC's Family thinking it was her that brought Good luck to them but it was actually the MC (Because of her power that grants wishes(?)).
It was historical shoujou. The female MC had pink hair and left/disowned by her family thinking she was useless. Then she got close to a Duke family that is said to have Bad omen aroumd them (?) or something like they were an unlucky Family. The Duke family had BLACK hair. The MC has a sister with Red hair and is said to be cherished by the MC's Family thinking it was her that brought Good luck to them but it was actually the MC (Because of her power that grants wishes(?)).