The Dominican Republic in my opinion does not have a major issue with discrimination on the grounds of colour, but those who are black are often considered to be Haitian, and in some areas there is discrimination against Haitians. Look at this photo.
These guys all worked for me. The one in the red baseball cap is Haitian and here legally with a visa. The one in the white vest is Dominican and comes from a family of Cocolos. That is, his grandparents came here from St Kitts where they were descended from African cane cutters. They came to the DR to cut cane, and in fact they still speak English. The one in the orange shirt is Dominican pure bred. All three of them are more or less the same colour. The one on the end is also Dominican.
My husband who is brown and likes to say he is descended from the Indians, had never experienced prejudice on behalf of his colour until we went to England where we would get comments and insults. Every black person he saw there he thought was Haitian and couldn't understand why they could not understand him when he spoke in Creole! It was as hard for him to understand why someone would be prejudiced against someone because of his colour as it is for those who are used to prejudice to come here and not realise that the same level does not exist.
It cannot be denied that there is prejudice on the part of some Dominicans against some Haitians, due in part to the long history between the two nations. Dominicans celebrate independence day on 27 February and I always thought it was independence from Spain, but it is independence from Haiti.
We all want to live in a world free from prejudice and discrimination be it colour, religion, sex whatever. The Dominican Republic is not perfect in this respect, but it is certainly a lot better than some other countries.