ΔE 10.7, fair: the same colour family, but not a straight swap. Military Blue is a little darker, more muted, warmer than Ahriman Blue.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Military Blue is a little darker, more muted, warmer than Ahriman Blue.
The same difference applies the other way round: Ahriman Blue is a little lighter, more saturated, cooler.
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 Ahriman Blue on the colour wheel See Military Blue on the colour wheel
All matches: Ahriman Blue equivalents · Military Blue equivalents