I think most all of us would agree that it is crucial to share books with kids that reflect the diversity of our world. Even when we live in mostly homogeneous areas, it is vitally important to share books and materials that offer positive and regular images of many kinds of people.
Check out the blog Everyday Diversity, which highlights books that are easy to incorporate into storytimes with many different kinds of themes, and which prominently feature people of color. Remember, you don’t have to have a program specifically about diversity in order to include books that include it! They should just be part of the mix!