ΔE 13.9, fair: the same colour family, but not a straight swap. Wrack White is much more muted than Pale Sand.
Can I use Wrack White instead of Pale Sand?
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Wrack White is much more muted than Pale Sand.
Can I use Pale Sand instead of Wrack White?
The same difference applies the other way round: Pale Sand is much more saturated.
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.