Cairn Gorm
Cairn Gorm is described by Paul Gardner as "nearly a  dark amber". 
http://www.curriehj.freeserve.co.uk/typeloc.htm
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List of Shapes Made in Cairn Gorm
What makes this a difficult task is that many of these shapes were also made in topaz and amber so trying to discern what hue Cairn Gorm really is might end up being hypothetical.  Because Frederick Carder was so close to his replications of other gemstone colors, today's collector should be guided by what a gemologist would call Cairngorm Stone.
Here are some background links on the color of the gemstone Cairngorm.
Cairngorm Stone
a gemstone from the Cairngorm Mountains, Scotland
Shapes
6096, 6179, 6180 Gardner page 164 6113, 6114, 6115, 6116  page 192
Topaz,Amber, or Cairn Goyn, Cayn Goym, Cairn Gorm
Most likely the color of  this heavy cut Warwick Pattern (Honeycomb Optic) console set is Cairn Gorm, although this is theoritical deduction.
Shape 6096
"Warwick" Cut Pattern
Color Index
Site Map
Carder Steuben Club
So here we have Paul Gardner, Frederick Carders' assistant describing this color as an amber and a sales reporter describing it as topaz.

75 plus years later, we try and piece together what color hue this actually is.   In the blueprints, there are several shapes that are listed as being made in "Cain Goyn" which is the phonetically how an Englishman would have pronounced Cairn Gorm.  Below is a  list these shapes that this color was made in according to the blue prints.
Cairngorm is described in "China,Glass, and Lamps" January 19, 1925  description of a Steuben display in Pittsburgh to the trade...
"...there is a a display of candlesticks, vases, bowls, etc., in the new color, Cairngorm, introduced this season, which strongly resembles topaz. "
© Carder Steuben Club