* Ancient Greek literature and art: Depictions of Hermes vary significantly. Some portray him with dark hair, while others show him with blonde or even reddish hair.
* Mythology: Greek mythology doesn't mention Hermes' hair color specifically. It focuses more on his attributes like swiftness, cleverness, and his role as messenger of the gods.
Therefore, it's safe to say we don't know for sure what color Hermes' hair was. It's left to individual artists and interpretations.