Which way do you spell it

I use both. Gray for dull dismal days and grey for my hair!

Hmm. I think I use grey, but I might use both.

Gray, Canada.
Though when dealing with Americans, I'll often use grey and drop 'u's from words like colour.

I’m pretty sure I mix them up.

I spell it with an "E." I'm from the USA. Both are correct, but I think I spell it the British way.

I always use grey and am from Australia where Queen’s English is the standard spelling although there are the occasional American English spellings that sneak through (like jail rather than gaol).

I don't like grey with an a. The only time I use the a form is if it's a name (like Basic Gray from Stampin' Up) already spelled that way. I actually don't like the 'you are my sunshine when skies are grey' products when they use an a instead...I've passed on plenty of cute things that I might have picked up with that saying if they spelled grey right.

I think using an 'e' is actually uncommon in the good ol' USA, but I prefer it that way.

The "e" looks more correct to me, but I'm sure I use both.

Grey in Australia

The Ohio State University Buckeyes colors are scarlet and gray

I prefer grey. But sometimes I drop gray.

With an e, from NZ but living in the US. I might change use the a spelling at times, but the e feels more correct to me.

We learned in school that grey is British and gray is US spelling (in general-not as a rule). Like color/colour. Fifty Shades of Grey follows that rule.

Grey and im from Canada