The ECMA text that yo cite precisely confirms that this is the way Eiffel text should read. That text is in fact saying the same as the Wikipedia rules: semantics should not depend on color. On the other hand, color should be used to reinforce semantics, in a consistent way.

Until I and another person started working on the Eiffel article a few weeks ago it was a disgrace, full of inaccuracies and opinions, with almost no factual information on the language. Apparently that was not a reason to complain. Now that we are devoting our time to producing a good article with the same standards of quality as a scientific publication we are being heckled by people who only care about enforcing some font commonality.

I wonder if you realize the harm that you are doing to Wikipedia by harassing the designer of the very technology that the article describes. Maybe I am naive or pretentious, but I would assume that such a contribution by the original author should be enjoyed rather than heckled down. If you want to turn away such contributors, and get to the level of soc.culture discussions, this is exactly the way to go. I don't assume that's the case, so please correct errors of substance if you find any (I make no claims of perfection) and in the meantime respect the conventions and rules of the topic being addressed. Thanks.