Screaming Skull vs Bloodless Skin

How close are they?

ΔE 9.9, close: similar, with a visible difference side by side. Bloodless Skin is a little darker, more saturated, cooler than Screaming Skull.

Can I use Bloodless Skin instead of Screaming Skull?

Usually, if you are not matching paint already on the model. Close match (ΔE 10). Bloodless Skin is a little darker, more saturated, cooler than Screaming Skull.

Can I use Screaming Skull instead of Bloodless Skin?

The same difference applies the other way round: Screaming Skull is a little lighter, more muted, 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.