ΔE 10.6, fair: the same colour family, but not a straight swap. Highlight Skin is more saturated than White Scar.
Can I use Highlight Skin instead of White Scar?
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Highlight Skin is more saturated than White Scar.
Can I use White Scar instead of Highlight Skin?
The same difference applies the other way round: White Scar is 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.