Blue black hair is one of those hair colors that makes you feel like a superstar. It's black hair with a blue sheen to it. It's bold, and cool and hot all at the same time. In this hub we feature celebrities with blue black hair color: Demi Lovato, Nelly Furtado, Wonder Woman, Rihanna, Katy Keene, and Katy Perry. Come along and take a look!