Rotten Flesh vs Desert Webbing

How close are they?

ΔE 7.5, close: similar, with a visible difference side by side. Desert Webbing is a little darker, more saturated than Rotten Flesh.

Can I use Desert Webbing instead of Rotten Flesh?

Usually, if you are not matching paint already on the model. Close match (ΔE 7). Desert Webbing is a little darker, more saturated than Rotten Flesh.

Can I use Rotten Flesh instead of Desert Webbing?

The same difference applies the other way round: Rotten Flesh is a little lighter, 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.