Leviathan Blue vs Caribbean Turquoise

How close are they?

ΔE 9.1, close: similar, with a visible difference side by side. Caribbean Turquoise is a little darker, more muted than Leviathan Blue.

Can I use Caribbean Turquoise instead of Leviathan Blue?

Usually, if you are not matching paint already on the model. Close match (ΔE 9). Caribbean Turquoise is a little darker, more muted than Leviathan Blue.

Can I use Leviathan Blue instead of Caribbean Turquoise?

The same difference applies the other way round: Leviathan Blue is a little lighter, more saturated.

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.