In his youth he had Dark Blonde Hair and Blue Eyes.
He is the last child of Cronus and Lysinda. Zeus killed his father Cronus, after Cronus killed his mother. Shortly after that the Titaness Dehak banded together a group of Titans and they tried to over take Olympus. They were defeated by them. Dehak then turned on her Titan siblings but was shortly defeated by Terra. Once Dehak was defeated Zeus threw the traitors, as he called them, into eternal prisons, except Armena who was tricked. Dehak, however, would forever be allowed to roam the earth as Evil/Destruction until the 'one who would rise from the ashes would be born to finally end her reign, whom was Zeus's first child by the Titaness Leto.
Zeus was forbidden to ever marry Leto, considering that she was a Titan Princess. Therefore he married his eldest sister Hera, though he never truly loved her.
Zeus is infamous for his many infedeleties and always taking the neutral stance in most everything that occurs, which has had some rather interesting and devastating consequences.