"Her hair was a close enough brand of German-blonde, but she had dangerous eyes."

Aryan Blonde
Creative Commons Attribution Share AlikeAryan Blonde - Credit: TheeErin, Flickr
Hitler believed that the Aryan race was the “master” race, and Aryans were the true people of Germany. They were identified by the ideal physical features of very blonde hair and very blue eyes.  

To maintain this “pure” race, the government banned mixed race marriages, introduced compulsory sterilisation of the mentally ill and deficient, and embarked on massive programmes of racial extermination.