ΔE 13.1, fair: the same colour family, but not a straight swap. Silver Grey is noticeably darker, more muted than Stormfang.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Silver Grey is noticeably darker, more muted than Stormfang.
The same difference applies the other way round: Stormfang is noticeably lighter, 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 Stormfang on the colour wheel See Silver Grey on the colour wheel
All matches: Stormfang equivalents · Silver Grey equivalents