ΔE 14.4, fair: the same colour family, but not a straight swap. Pallid Wych Flesh is a little lighter, warmer than Light Ghost Gray.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Pallid Wych Flesh is a little lighter, warmer than Light Ghost Gray.
The same difference applies the other way round: Light Ghost Gray is a little darker, cooler.
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 Light Ghost Gray on the colour wheel See Pallid Wych Flesh on the colour wheel
All matches: Light Ghost Gray equivalents · Pallid Wych Flesh equivalents