Necron Compound vs Iridescent Silver (Fine)

How close are they?

ΔE 8.5, close: similar, with a visible difference side by side. Iridescent Silver (Fine) is a little lighter than Necron Compound. They are different kinds of paint: Citadel Necron Compound is a metallic and Golden Iridescent Silver (Fine) is a pearl paint, so they won’t behave the same on the model even where the colour is close.

Can I use Iridescent Silver (Fine) instead of Necron Compound?

Usually, if you are not matching paint already on the model. Close match (ΔE 8). Iridescent Silver (Fine) is a little lighter than Necron Compound. They are different kinds of paint.

Can I use Necron Compound instead of Iridescent Silver (Fine)?

The same difference applies the other way round: Necron Compound 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.