Green Shark Skin vs Heretic Turquoise

How close are they?

ΔE 9.2, close: similar, with a visible difference side by side. Heretic Turquoise is a little darker, more muted, warmer than Green Shark Skin.

Can I use Heretic Turquoise instead of Green Shark Skin?

Usually, if you are not matching paint already on the model. Close match (ΔE 9). Heretic Turquoise is a little darker, more muted, warmer than Green Shark Skin.

Can I use Green Shark Skin instead of Heretic Turquoise?

The same difference applies the other way round: Green Shark Skin is a little lighter, more saturated, 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.