ΔE 13.3, fair: the same colour family, but not a straight swap. Ghoul Skin is a little darker, warmer than Light Feldgrau.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Ghoul Skin is a little darker, warmer than Light Feldgrau.
The same difference applies the other way round: Light Feldgrau is a little lighter, 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 Feldgrau on the colour wheel See Ghoul Skin on the colour wheel
All matches: Light Feldgrau equivalents · Ghoul Skin equivalents