ΔE 12.2, fair: the same colour family, but not a straight swap. Fairy Skin is a little darker, more muted, cooler than Seraphim Flesh.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Fairy Skin is a little darker, more muted, cooler than Seraphim Flesh.
The same difference applies the other way round: Seraphim Flesh is a little lighter, 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 Seraphim Flesh on the colour wheel See Fairy Skin on the colour wheel
All matches: Seraphim Flesh equivalents · Fairy Skin equivalents