I'd like to know the etymology of the word "ginger" in reference to red-headed people.
In particular, if "ginger" in this context is related to the plant root used in cooking, I'd like to know how the color red became associated with it. I am only familiar with ginger roots that do not possess any red coloring.
A quick google search yields vague and somewhat conflicting results. An authoritative answer with references would be appreciated.
Edit: Although an answer has pointed out a distinction between the term "ginger" and "red-head" in terms of physical features, there is certainly a tendency to see the term applied to people with hair that is any shade of red. I would be interested to trace the usage history of how the word ginger has been applied in that more broad sense.
Best Answer
The OED online has this listed as definition 5.B of "ginger":
So, as indicated by "having the color of ginger," someone at some point was quite convinced that the color of ginger was indeed red.