Desert Webbing vs Morghast Bone

How close are they?

ΔE 8.5, close: similar, with a visible difference side by side. Morghast Bone is more muted, warmer than Desert Webbing.

Can I use Morghast Bone instead of Desert Webbing?

Usually, if you are not matching paint already on the model. Close match (ΔE 9). Morghast Bone is more muted, warmer than Desert Webbing.

Can I use Desert Webbing instead of Morghast Bone?

The same difference applies the other way round: Desert Webbing 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.