ΔE 13.4, fair: the same colour family, but not a straight swap. Skin Tone is a little lighter, much more saturated than Sand Grey.
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, much more saturated than Sand Grey.
The same difference applies the other way round: Sand Grey is a little darker, much more muted.
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 Sand Grey on the colour wheel See Skin Tone on the colour wheel
All matches: Sand Grey equivalents · Skin Tone equivalents