ΔE 12.1, fair: the same colour family, but not a straight swap. Terminatus Stone is noticeably darker, cooler than Basic Flesh.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Terminatus Stone is noticeably darker, cooler than Basic Flesh.
The same difference applies the other way round: Basic Flesh is noticeably lighter, warmer.
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 Basic Flesh on the colour wheel See Terminatus Stone on the colour wheel
All matches: Basic Flesh equivalents · Terminatus Stone equivalents