Gunner Camo vs Heretic Turquoise

How close are they?

ΔE 6.6, close: similar, with a visible difference side by side. Heretic Turquoise is cooler than Gunner Camo.

Can I use Heretic Turquoise instead of Gunner Camo?

Usually, if you are not matching paint already on the model. Close match (ΔE 7). Heretic Turquoise is cooler than Gunner Camo.

Can I use Gunner Camo instead of Heretic Turquoise?

The same difference applies the other way round: Gunner Camo is 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.