ΔE 10.3, fair: the same colour family, but not a straight swap. Intermediate Blue (US Navy) is more saturated, cooler than Stormfang.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 10). Intermediate Blue (US Navy) is more saturated, cooler than Stormfang.
The same difference applies the other way round: Stormfang is more muted, 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 Stormfang on the colour wheel See Intermediate Blue (US Navy) on the colour wheel
All matches: Stormfang equivalents · Intermediate Blue (US Navy) equivalents