Well, no need for apologizing. I did not expressed clearly what I was doing, to begin with.
In short: The intention was to make "known" colors appear on the KLC and investigate how they looked on the real KLC display.
That to choose the right blue color to make the document links stand out as they are hardly noticeable. (and you must encode them otherwise they are by default black, which was another finding)
So I hacked a quick and dirty HTML-page to display several most used and known colors by their "official" names to make it reproducible. In real life I use color-codes and names where and when it suits me best.
So my finding was that one of the "official" color names was not recognized by the KLC. And that goes for EPUB and KEPUB.
My other finding is that the real rendering on the KLC screen is lacking distinction as most blue (darker) colors for instance look very the same. But that was expected (there is a reason why I choose actually the TLC Nxtpaper 11 for my colored documents
)