ΔE 14.8, fair: the same colour family, but not a straight swap. Russ. AF Grey N.8 is a little darker, more muted, cooler than Augur Blue.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 15). Russ. AF Grey N.8 is a little darker, more muted, cooler than Augur Blue.
The same difference applies the other way round: Augur Blue is a little lighter, 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.
See Augur Blue on the colour wheel See Russ. AF Grey N.8 on the colour wheel
All matches: Augur Blue equivalents · Russ. AF Grey N.8 equivalents