ΔE 11.1, fair: the same colour family, but not a straight swap. Zombie Rot is a little lighter, more saturated, warmer than Necrotic Flesh.
✓ Two Thin Coats comparison chart lists these two as equivalents.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Zombie Rot is a little lighter, more saturated, warmer than Necrotic Flesh.
The same difference applies the other way round: Necrotic Flesh 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 Necrotic Flesh on the colour wheel See Zombie Rot on the colour wheel
All matches: Necrotic Flesh equivalents · Zombie Rot equivalents