ΔE 11.8, fair: the same colour family, but not a straight swap. Fairy Flesh is more saturated, cooler than Peach Skin.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Fairy Flesh is more saturated, cooler than Peach Skin.
The same difference applies the other way round: Peach Skin 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 Peach Skin on the colour wheel See Fairy Flesh on the colour wheel
All matches: Peach Skin equivalents · Fairy Flesh equivalents