Necrotic Flesh vs Terre Verte Hue

How close are they?

ΔE 6.0, close: similar, with a visible difference side by side. Terre Verte Hue is a little darker than Necrotic Flesh.

Can I use Terre Verte Hue instead of Necrotic Flesh?

Usually, if you are not matching paint already on the model. Close match (ΔE 6). Terre Verte Hue is a little darker than Necrotic Flesh.

Can I use Necrotic Flesh instead of Terre Verte Hue?

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

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.