ΔE 12.4, fair: the same colour family, but not a straight swap. Wrack White is noticeably lighter, more muted than Pallid Wych Flesh.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Wrack White is noticeably lighter, more muted than Pallid Wych Flesh.
The same difference applies the other way round: Pallid Wych Flesh is noticeably darker, more saturated.
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 Pallid Wych Flesh on the colour wheel See Wrack White on the colour wheel
All matches: Pallid Wych Flesh equivalents · Wrack White equivalents