Castellax Bronze vs Arcane Gold

How close are they?

ΔE 9.6, close: similar, with a visible difference side by side. Arcane Gold is a little lighter, more saturated, cooler than Castellax Bronze.

Can I use Arcane Gold instead of Castellax Bronze?

Usually, if you are not matching paint already on the model. Close match (ΔE 10). Arcane Gold is a little lighter, more saturated, cooler than Castellax Bronze.

Can I use Castellax Bronze instead of Arcane Gold?

The same difference applies the other way round: Castellax Bronze is a little darker, more muted, 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.