Undead Flesh vs IAF Sand

How close are they?

ΔE 10.7, fair: the same colour family, but not a straight swap. IAF Sand is more muted, warmer than Undead Flesh.

Can I use IAF Sand instead of Undead Flesh?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). IAF Sand is more muted, warmer than Undead Flesh.

Can I use Undead Flesh instead of IAF Sand?

The same difference applies the other way round: Undead Flesh is more saturated, cooler.

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.