Could it be because that hair reminded her of her mother's?

Somehow, the broad, muscular shoulders and dark hair reminded him of Altara.

His hair was tawny and reminded me of a lion's mane.

He said that my hair, like his son's, reminded him of sand when the sun is shining on it.

The hairs reminded her of an incident at work.

'Her hair reminded me of your girl here,' I said.

The gray hair, the bent, sprawled form, already reminded him too much of Pop.

The guard's dark hair and lean features reminded her of Leto's own.

His hair reminded me of white tennis ball fuzz.

Only his white hair reminds us that he is, after all, an aged man and king.