How do Brits spell grey?

Brits spell the color as grey with an e, following British English spelling conventions. In the United Kingdom, the standard and expected spelling for the color is grey, whether you are describing grey hair, grey sky, grey area, or greyhound. The spelling gray with an a is considered the American English variant and is less common in British publications, though it is understood due to exposure to American media and products. British dictionaries such as Oxford English Dictionary list grey as the primary spelling. You would write grey in formal British writing, newspapers, school materials, and official documents. The same applies to related terms like greyish. Consistency matters, so if you are writing in British English, you should also use other British spellings such as colour, flavour, centre, and behaviour alongside grey. So the answer is Brits spell it grey with an e, not gray with an a, reflecting historical British spelling that is also used in Australia, Canada, and New Zealand as the preferred form.