ΔE 9.6, close: similar, with a visible difference side by side. RLM 78 Light Blue is a little lighter than Stormfang.
Usually, if you are not matching paint already on the model. Close match (ΔE 10). RLM 78 Light Blue is a little lighter than Stormfang.
The same difference applies the other way round: Stormfang is a little darker.
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 RLM 78 Light Blue on the colour wheel
All matches: Stormfang equivalents · RLM 78 Light Blue equivalents