ΔE 14.5, fair: the same colour family, but not a straight swap. Catachan Flesh is a little lighter, more saturated, warmer than Black Rose Immortal.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Catachan Flesh is a little lighter, more saturated, warmer than Black Rose Immortal.
The same difference applies the other way round: Black Rose Immortal is a little darker, more muted, cooler.
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 Black Rose Immortal on the colour wheel See Catachan Flesh on the colour wheel
All matches: Black Rose Immortal equivalents · Catachan Flesh equivalents