Imrik Blue vs Amarth Blue

How close are they?

ΔE 9.2, close: similar, with a visible difference side by side. Amarth Blue is a little lighter, cooler than Imrik Blue.

Can I use Amarth Blue instead of Imrik Blue?

Usually, if you are not matching paint already on the model. Close match (ΔE 9). Amarth Blue is a little lighter, cooler than Imrik Blue.

Can I use Imrik Blue instead of Amarth Blue?

The same difference applies the other way round: Imrik Blue is a little darker, 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.