The Scott 2016 Classic Specialized Catalogue only lists brown. But if you refer to the Scott Specialized Catalogue it lists yellow brown as well, and other info.
I am a bit disgruntled with the "Classic" Catalogue for this kind of omission, but I guess that's the price one pays for putting the whole world in one book. I will be upgrading my 2007 Specialized Catalogue sooner rather than later.
#684 (Used) has gone up in value from .20 in 2007 to .25 in 2016.
