Of course she's not a true red

As the parent of a "ginger", and having red heads on both sides of the family, and having married into two Irish families, I know first hand that ginger covers the whole spectrum from strawberry blonde (to my way of thinking a classic ginger!), to orange (carrot tops), to a real rust red (what my father in law would call a true red).  When Pat Todkill first set eyes on his granddaughter, he remarked, "Of course, she's not a true red".  For one thing, Emily the Elder lacked freckles on her face and upper body.  For another, she really was and is a strawberry blonde.

A further observation.  Even people with the raven blackest hair have rust red lights--caveman red, soot covered ochre if you like.  Woolly mammoth red.  Sometimes it takes just the right light to pick out the smoldering ember, but beard and eyebrows tend to incorporate the tell tale ginger strain, like chili pepper in a spice jar of mixed pepper corns.

And, of course, brunettes are so close to true reds it isn't even funny.

Those more familiar with horses than Neanderthals or bog bodies know that there are no truly black nor absolutely white horses, only dark bays and light greys, cow blazes and white socks, dappled greys and palominos to the contrary notwithstanding.