Dusk Red vs Demonic Skin

How close are they?

ΔE 8.5, close: similar, with a visible difference side by side. Demonic Skin is more muted, cooler than Dusk Red.

Can I use Demonic Skin instead of Dusk Red?

Usually, if you are not matching paint already on the model. Close match (ΔE 8). Demonic Skin is more muted, cooler than Dusk Red.

Can I use Dusk Red instead of Demonic Skin?

The same difference applies the other way round: Dusk Red is 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.