Add grey as an equivalent to gray

[nailuj29]

Some people spell gray as grey, so this PR should prevent any confusion

[pmonks]

And by "some people", am I right to assume that you mean "a majority of people who read & write the English language"? Only around 25% of English speakers on earth spell this word "gray".

[nailuj29]

@pmonks yes, you would be correct

[adamwathan]

Hey! This significantly increases the file size of Tailwind in development mode, as well as in the CDN build, so not going to merge unfortunately. You can rename gray to grey in your own config file if you want — you're encouraged to name your colors whatever you like.

I chose gray because that's how it is spelled in the native CSS APIs, like:

.grayscale {
  filter: grayscale(1)
}

[nailuj29]

@adamwathan The color grey is spelled both ways in CSS. See this image:

[nailuj29]

Also, most people will be using something like PurgeCSS in production, so the increase in file size doesn't really matter.

[nailuj29]

@adamwathan just tested it, and it only increases the size by .2 megabytes, which isn't much at all.

The top one had no grey, and the bottom one did

[jsonkody]

I was constantly writing grey-... which is not working and then found out that I am not crazy, just the English is.