ΔE 14.2, fair: the same colour family, but not a straight swap. Dark Warm Flesh is noticeably lighter, more saturated than Brethil Blush.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Dark Warm Flesh is noticeably lighter, more saturated than Brethil Blush.
The same difference applies the other way round: Brethil Blush is noticeably darker, more muted.
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 Dark Warm Flesh on the colour wheel
All matches: Brethil Blush equivalents · Dark Warm Flesh equivalents