Freezing Moon vs Russian AF Grey N.3

How close are they?

ΔE 12.6, fair: the same colour family, but not a straight swap. Russian AF Grey N.3 is a little darker, more muted than Freezing Moon.

Can I use Russian AF Grey N.3 instead of Freezing Moon?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Russian AF Grey N.3 is a little darker, more muted than Freezing Moon.

Can I use Freezing Moon instead of Russian AF Grey N.3?

The same difference applies the other way round: Freezing Moon 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.