Grotesque Green vs Bloodless Skin

How close are they?

ΔE 9.0, close: similar, with a visible difference side by side. Bloodless Skin is more saturated, warmer than Grotesque Green.

Can I use Bloodless Skin instead of Grotesque Green?

Usually, if you are not matching paint already on the model. Close match (ΔE 9). Bloodless Skin is more saturated, warmer than Grotesque Green.

Can I use Grotesque Green instead of Bloodless Skin?

The same difference applies the other way round: Grotesque Green is more muted, 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.