Castellax Bronze vs Afterburner

How close are they?

ΔE 6.8, close: similar, with a visible difference side by side. Afterburner is more saturated than Castellax Bronze.

Can I use Afterburner instead of Castellax Bronze?

Usually, if you are not matching paint already on the model. Close match (ΔE 7). Afterburner is more saturated than Castellax Bronze.

Can I use Castellax Bronze instead of Afterburner?

The same difference applies the other way round: Castellax Bronze 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.