ΔE 10.5, fair: the same colour family, but not a straight swap. Karak Stone is a little darker, more muted, cooler than Sand.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 10). Karak Stone is a little darker, more muted, cooler than Sand.
The same difference applies the other way round: Sand is a little lighter, 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 Sand on the colour wheel See Karak Stone on the colour wheel
All matches: Sand equivalents · Karak Stone equivalents