Pale Sand vs Fang White

How close are they?

ΔE 6.7, close: similar, with a visible difference side by side. Fang White is a little lighter, more saturated than Pale Sand.

Can I use Fang White instead of Pale Sand?

Usually, if you are not matching paint already on the model. Close match (ΔE 7). Fang White is a little lighter, more saturated than Pale Sand.

Can I use Pale Sand instead of Fang White?

The same difference applies the other way round: Pale Sand is a little darker, 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.