ΔE 14.6, fair: the same colour family, but not a straight swap. Smoke is a little darker, much more muted than Blue Horror.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 15). Smoke is a little darker, much more muted than Blue Horror.
The same difference applies the other way round: Blue Horror is a little lighter, much more saturated.
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 Blue Horror on the colour wheel See Smoke on the colour wheel
All matches: Blue Horror equivalents · Smoke equivalents