At the risk of being facetious, if you can't see the colour and you are being given status/instructions, how does mention of the color improve things? I think the current text will become more meaningful with some practice.
I guess it is my responsibility to find suitable models.
Don, You, being facetious? I would have never thought that..
My suggestion was also for the colour gifted people as well, as it gives them, and the colour challenged a reference value to match against. It was not a criticism of the manual, just a suggestion.
As for model matching etc, as you say, more practice is needed.