ΔE 9.8, close: similar, with a visible difference side by side. Fair Skin is a little lighter, more muted, cooler than Eldar Flesh.
Usually, if you are not matching paint already on the model. Close match (ΔE 10). Fair Skin is a little lighter, more muted, cooler than Eldar Flesh.
The same difference applies the other way round: Eldar Flesh is a little darker, 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 Eldar Flesh on the colour wheel See Fair Skin on the colour wheel
All matches: Eldar Flesh equivalents · Fair Skin equivalents