From the Bartlett Yarns web site: The Glen Tweed yarns trace their color heritage to the warm textures and tones of authentic Scottish checks and tweeds. Every Glen Tweed shade is an imaginative blend of three or more colors. All of the Glen Tweed color “roots” can also be found in a complimentary yarn color in our Fisherman yarn line.

The colors considered Glen Tweed are:

Bronze
Willow
Bracken
Lovat
Bluebell
Granite
Raspberry
Scotia
Dark Lovat

Note that the 3-ply yarn is not currently listed on the Bartlett Yarns website. It is still available in the same colors as the 2-ply yarn.