Sky Blue vs Russian AF Grey N.7

How close are they?

ΔE 12.4, fair: the same colour family, but not a straight swap. Russian AF Grey N.7 is a little lighter, more muted, cooler than Sky Blue.

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

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Russian AF Grey N.7 is a little lighter, more muted, cooler than Sky Blue.

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

The same difference applies the other way round: Sky Blue is a little darker, 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.