Rainfall Blue vs Russian AF Grey N.7

How close are they?

ΔE 10.9, fair: the same colour family, but not a straight swap. Russian AF Grey N.7 is more muted, cooler than Rainfall Blue.

Can I use Russian AF Grey N.7 instead of Rainfall Blue?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Russian AF Grey N.7 is more muted, cooler than Rainfall Blue.

Can I use Rainfall Blue instead of Russian AF Grey N.7?

The same difference applies the other way round: Rainfall Blue is more saturated, 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.