Is it true that marriage to a woman who has vitiligo is not allowed? If so, why is that the case when vitiligo is not contagious nor dangerous?
Bismihi ta'ala
No, it is not true that it is not allowed to marry a woman who has vitiligo. Anyone can get married in Islam, as long as they meet the correct requirements and obligatory conditions.
A skin disease would not be something that impedes a person from getting married.
With prayers for your success.