Shieldwall Blue vs Russian AF Blue

How close are they?

ΔE 7.9, close: similar, with a visible difference side by side. Russian AF Blue is a little darker, more muted than Shieldwall Blue.

Can I use Russian AF Blue instead of Shieldwall Blue?

Usually, if you are not matching paint already on the model. Close match (ΔE 8). Russian AF Blue is a little darker, more muted than Shieldwall Blue.

Can I use Shieldwall Blue instead of Russian AF Blue?

The same difference applies the other way round: Shieldwall 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.