There's been discussion here and on photos, plus I see comments in
catalogs about the color fastness of gold/deep yellow TBs.

Which gold or deep yellow TBs/breeding lines are known as being the most
colorfast in bright sun these days?

Most of my deep gold seedlings are not at all colorfast - except around
beards and near base of standards, the falls on some bleach to pure
white before folding.

Linda Mann east TN USA zone 7