What is the difference between gray and grey?

Answer 1

Grey tends to be a darker colour with many variations after black. It can suggest ashy, cloudy, sunless dull and hopeless situations as well as colour variations. Silver may be described as a precious metal of brilliant (white) colour. It has fewer variations in tone whilst still being on the brighter side of grey

Answer 2

They are equivalent to each other in meaning but British English chose "grey" as the standard during the 20th century.

They are the same thing, and either one can be used.

Grey is commonly accepted as the English spelling of the word, while gray is the American English spelling. As in the cases of color/colour, jewelry/jewellery, labor/labour and defense/defence, American English has used a more phonetic spelling of the word to make the language easier to read, write and understand.

Other Answer:

That's actually not true. Grey is a British Statesman. Gray is the color. So technically they're homophones.
Grey's British, and Gray's American
The only difference is the letters A and E. Both words mean exactly the same thing.
Both spellings of grey/gray are correct. Grey is used more in the UK and Europe.