ΔE 11.0, fair: the same colour family, but not a straight swap. Pestilent Flesh is more saturated, cooler than Putrid White.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Pestilent Flesh is more saturated, cooler than Putrid White.
The same difference applies the other way round: Putrid White is more muted, 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 Putrid White on the colour wheel See Pestilent Flesh on the colour wheel
All matches: Putrid White equivalents · Pestilent Flesh equivalents