I agree that "Dubloons" suggests a more saturated color than what photos of fully open flowers depict here. It also suggests a color on the reddish side of yellow i.e. apricot or gold. Quest-Ritson in Climbing Roses of the World (p62) says that Doubloons "was initially hailed as a hardy yellow climber" but later "was criticized because the flowers" ... "fade from deep yellow to lemon yellow."

I think one thing that has changed is our use of language to describe roses. Jaune Desprez, for example, roughly translates to Desprez' Yellow. By standards of the day (early nineteenth century) it was yellow. And that color was considered the color of a yellow rose for nearly a century - never mind that Harison's yellow was sixteen shades brighter. It would not be until the 1950s that it would be common for "yellow" to refer only to roses with the saturated color of Arthur Bell or Midas Touch. And getting that saturated color in an unfading version and without blackspot was an even later development. I think it was not until at least the middle 1990's that the ARS color notations used the word "orange" even though distinctly orange roses were bred far more than a decade earlier. Some of Pernet-Ducher's introductions would be hard to describe without using the word "orange." Not sure whether apricot is in the ARS lexicon yet.; but it should be.

As we get more specific about the color - in referring to roses that fade, darken, or blush with age - we find that we need to have temporal qualifiers added to their color descriptions. I would suggest that Dubloons opens yellow or pale apricot and fades to ivory or buff. But to some it will simply be yellow. http://www.rosefile.com/RosePages/byColor.html .

There is a found rose in commerce by the name of "Mr. Nash." It may be a Doubloons that has been re-found.
You can read the profile on helpmefind at:
http://www.helpmefind.com/rose/pl.php?n=24013