In US you would say: Gray color…
In Great Britain it would be: Grey colour…
Grey (British English) or gray (American English; see spelling differences) is an intermediate color between black and white. It is a neutral or achromatic color, meaning literally that it is a color “without color.” This means that there are equal components of red, green, and blue. The variations in intensity of these colors uniformly produce different shades of grey. It is the color of a cloud-covered sky, of ash and of lead.
Grey and Gray—Are They Always Interchangeable?
In common usage, there’s no difference between the words grey and gray. Some people might believe each spelling refers to a different shade of gray, and it’s quite possible you’ll see this in practice when looking at color swatches.
But there are a couple of cases where you really should mind the vowels. One of those cases is greyhound, the dog breed. It should always be spelled with an e, not an a. It’s the other way around for the grayling, a species of fish with a name that’s always spelled with an a.
If Grey is someone’s last name, you obviously shouldn’t change it to Gray to match the way you think it should be spelled. Proper nouns are off limits—the vowels in them cannot be changed. And neither can the vowel in Gray, the unit for food irradiation—it’s always spelled with an a.
Source of the Featured Image: Wikipedia.