The different spellings of "Gray" or "Grey"

Grey is the European spelling whereas Gray is the American spelling. (One way to remember: E for Europe, A for America).

That being said, Gray is the proper spelling for code stuffs: http://www.crockford.com/wrrrld/color.html

You can use either “gray” or “grey” if your browser is CSS3 compliant. I checked it out on my Chrome 43.0.2357.124 m — and both “gray” and “grey” displayed the same.

HTML Element Names, Attributes, CSS Properties, Key Words, etc., are specified in standards documents produced by the W3C that rise to the level of a “Recommendation”. The browser companies use the names, keywords, etc. that are defined in these documents.

Seventeen (17) color names were defined in CSS 2.1 (2011) in section 4.3.6, and one of them was “gray” (not “grey”).

In CSS 3 (2011) Color Module Level 3, in section 4.1 the list of “Basic” named colors was reduced to Sixteen (16) — I have no idea what they had against “orange” — and 130 “Extended” color keywords were added, including — wait for it — alternate spellings for the “grays”.

A CSS3 browser will support either:

• darkslategray or darkslategrey,
• dimgray or dimgrey,
• gray or grey,
• lightgray or lightgrey,
• lightslategray or lightslategrey,
• slategray or slategrey

Grey= D3D3D3 - 211 211 211

Gray= 808080 - 128 128 128

"gray". just like we use "color:" instead of "colour:".