Pure Yellow vs Ironjawz Yellow

How close are they?

ΔE 7.9, close: similar, with a visible difference side by side. Ironjawz Yellow is more saturated than Pure Yellow. They are different kinds of paint: AMMO by Mig Pure Yellow is an opaque base/layer paint and Citadel Ironjawz Yellow is a one-coat contrast-style paint, so they won’t behave the same on the model even where the colour is close.

Can I use Ironjawz Yellow instead of Pure Yellow?

Usually, if you are not matching paint already on the model. Close match (ΔE 8). Ironjawz Yellow is more saturated than Pure Yellow. They are different kinds of paint.

Can I use Pure Yellow instead of Ironjawz Yellow?

The same difference applies the other way round: Pure Yellow is 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.