Necrotic Flesh vs Contagion Green

How close are they?

ΔE 9.6, close: similar, with a visible difference side by side. Contagion Green is a little darker, more muted, cooler than Necrotic Flesh.

Can I use Contagion Green instead of Necrotic Flesh?

Usually, if you are not matching paint already on the model. Close match (ΔE 10). Contagion Green is a little darker, more muted, cooler than Necrotic Flesh.

Can I use Necrotic Flesh instead of Contagion Green?

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