ΔE 12.0, fair: the same colour family, but not a straight swap. IDF Blue is a little darker, more muted, cooler than Wolf Grey.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). IDF Blue is a little darker, more muted, cooler than Wolf Grey.
The same difference applies the other way round: Wolf Grey 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 Wolf Grey on the colour wheel See IDF Blue on the colour wheel
All matches: Wolf Grey equivalents · IDF Blue equivalents