Stormhost Silver vs Interference Violet (Fine)

How close are they?

ΔE 22.7, loose: different enough that you should pick on purpose. Interference Violet (Fine) is noticeably lighter, more saturated than Stormhost Silver. They are different kinds of paint: Citadel Stormhost Silver is a metallic and Golden Interference Violet (Fine) is a pearl paint, so they won’t behave the same on the model even where the colour is close.

Can I use Interference Violet (Fine) instead of Stormhost Silver?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 23). Interference Violet (Fine) is noticeably lighter, more saturated than Stormhost Silver. They are different kinds of paint.

Can I use Stormhost Silver instead of Interference Violet (Fine)?

The same difference applies the other way round: Stormhost Silver is noticeably darker, more muted.

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.