The Evil Queen's hair is black.
This is a well-known fact about the character, and it is often depicted in various adaptations of the story Snow White.
For example, in the Disney animated film Snow White and the Seven Dwarfs (1937), the Evil Queen's hair is a striking black, contrasting with her pale skin and dark eyes.
This dark hair is often associated with her character, representing her wickedness and her desire for power.
