ΔE 11.5, fair: the same colour family, but not a straight swap. Barbarian Skin is a little darker, more muted, cooler than Brethil Blush.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Barbarian Skin is a little darker, more muted, cooler than Brethil Blush.
The same difference applies the other way round: Brethil Blush is a little lighter, more saturated, 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 Brethil Blush on the colour wheel See Barbarian Skin on the colour wheel
All matches: Brethil Blush equivalents · Barbarian Skin equivalents