Hi
Speaking as someone whose eyesight isn't quite as good as it used to be, I'd like to suggest that anything in a colour is also in bold so that there are enough pixels for me to see what the colour is.
And this seems the appropriate place to ask why the examples are all in fixed pitch Courier in any case. I know this is kind of industry standard but it's one I don't find particularly helpful. I was once adept on the card punch machines and mechanical typewriters, but I think most of us abandoned fixed pitch fonts long, long ago. I'd suggest a sans serif font so that there's a clear contrast with the Georgia used as the text font in the documentation. Helvetica, Franklin Gothic and Source Sans Pro look good but I realize they might not be available on some platforms.
HTH
Paul McKay