ΔE 12.5, fair: the same colour family, but not a straight swap. Skin Tone is a little lighter, more muted, cooler than Light Sand.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Skin Tone is a little lighter, more muted, cooler than Light Sand.
The same difference applies the other way round: Light Sand 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 Light Sand on the colour wheel See Skin Tone on the colour wheel
All matches: Light Sand equivalents · Skin Tone equivalents