There are official CSS colors

CSS introduced a lot of new concepts in the way that we manage Web pages. And one of those things was the list of official color keywords. CSS color keywords are essentially the same as the SVG color keywords, but there are fewer of them. They are also more readily supported by most user agents and browsers. If you have just gotten started using color keywords, you should focus on the official CSS color keywords before moving onto the SVG keywords.

• CSS Color Keywords