ΔE 12.1, fair: the same colour family, but not a straight swap. Rotten Flesh is more muted, cooler than Papyrus.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Rotten Flesh is more muted, cooler than Papyrus.
The same difference applies the other way round: Papyrus is 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 Papyrus on the colour wheel See Rotten Flesh on the colour wheel
All matches: Papyrus equivalents · Rotten Flesh equivalents