ΔE 11.5, fair: the same colour family, but not a straight swap. Thamar Black is noticeably darker, more muted than Brigandine Brown.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Thamar Black is noticeably darker, more muted than Brigandine Brown.
The same difference applies the other way round: Brigandine Brown is noticeably lighter, more saturated.
ΔE is the colour difference between our two swatch estimates: under about 6 is close, over about 15 is loose. Real paints also differ in finish, coverage and how they thin, so test before you commit.
See Brigandine Brown on the colour wheel See Thamar Black on the colour wheel
All matches: Brigandine Brown equivalents · Thamar Black equivalents