Flayed One Flesh vs Light Sand

How close are they?

ΔE 9.9, close: similar, with a visible difference side by side. Light Sand is more saturated, cooler than Flayed One Flesh.

Can I use Light Sand instead of Flayed One Flesh?

Usually, if you are not matching paint already on the model. Close match (ΔE 10). Light Sand is more saturated, cooler than Flayed One Flesh.

Can I use Flayed One Flesh instead of Light Sand?

The same difference applies the other way round: Flayed One Flesh is more muted, warmer.

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.