She has blonde and brunette hair and eyelashes
Although it is not frequent, a person can be born with two different hair colors and two different eyelash colors in this case. There may be no true reason behind her brows remaining the same hue, but that is the beauty of having an unexplainable genetic skin condition.
As we have seen before through this article, heterochromia is an uncommon condition that may cause the right and left eyelashes to have different colors. And while there are probable reasons for some hereditary diseases, for others, things just seem to happen. Therefore, people end up with the most unusual appearances we have ever seen.