Skink Blue vs Russian AF Blue

How close are they?

ΔE 7.2, close: similar, with a visible difference side by side. Russian AF Blue is more saturated than Skink Blue.

Can I use Russian AF Blue instead of Skink Blue?

Usually, if you are not matching paint already on the model. Close match (ΔE 7). Russian AF Blue is more saturated than Skink Blue.

Can I use Skink Blue instead of Russian AF Blue?

The same difference applies the other way round: Skink Blue is more muted.

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.