USMC Sand FS 33711 vs Fairy Flesh

How close are they?

ΔE 12.9, fair: the same colour family, but not a straight swap. Fairy Flesh is much more saturated than USMC Sand FS 33711.

Can I use Fairy Flesh instead of USMC Sand FS 33711?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Fairy Flesh is much more saturated than USMC Sand FS 33711.

Can I use USMC Sand FS 33711 instead of Fairy Flesh?

The same difference applies the other way round: USMC Sand FS 33711 is 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.