ΔE 9.6, close: similar, with a visible difference side by side. IAF Sand is a little lighter, more muted, cooler than Skeleton Legion.
Usually, if you are not matching paint already on the model. Close match (ΔE 10). IAF Sand is a little lighter, more muted, cooler than Skeleton Legion.
The same difference applies the other way round: Skeleton Legion 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 Skeleton Legion on the colour wheel See IAF Sand on the colour wheel
All matches: Skeleton Legion equivalents · IAF Sand equivalents