When to use "Greys" and "gray".

[major bill]

While both describe the exact same color and are pronounced the same, are the two interchangeable?

While 'grey' is the English version of the American 'gray, when is it proper to use each? Many American militia companies used the term 'Greys' in their name. So the Adrian Greys wore gray uniforms.

In the 1970s Great Britain was a leading source of information about uniforms. Due to this I have found some American works using the English 'grey' by saying X company wore 'grey' uniforms. Where this become a problem for me is in my Michigan militia uniform data base. I will state that the Adrian Greys wore gray uniforms But the quote I use to support this has the newspaper using "grey' for the uniform color.

 

[Nathan Stuart]

While both describe the exact same color and are pronounced the same, are the two interchangeable?

Yes - believe the use of both spellings are interchangeable.
(Although the preponderant spelling in Britain seems to be 'grey'; in the US it's 'gray').

 

[Pollaco]

I've been wondering about that myself. My gg grandfather was briefly a member of Walker's Greyhounds or was it Walker''s Grayhounds?

 

[rebelatsea]

Strangely I seem to use both spellings - something I will have to look out for when I start proof reading my manuscript.
Doesn't help that a friend of mine is called Gray !