While we referred to Redheads as having ginger hair, we would never refer to them as a Ginger, or say "he's/she's Ginger", because that had very different connotation when I was young.
It was rhyming slang for Ginger Beer = Queer. So if you called someone a Ginger back then they'd deck you.
They were 'carrots', or more recently 'rangas', and redhaired men were invariably nicknamed Bluey.
The 'ranga' is short for Orangutan, not very PC, but very funny, and pretty much accepted by all now. Even our last PM, a woman, was referred to as 'the Ranga'.
We still don't call them Gingers here as far as I've heard, just Rangas.
I used to wish for hair like my grandmother's. It was that rich dark auburn and I loved it. She had just begun to go grey in her late 60s and and it was still mostly auburn when she died in her 70s. siiiiigh. I got my first bunch of grey for my 30th birthday. Damn!