Amber Alchemy vs Imperial Gold

How close are they?

ΔE 8.9, close: similar, with a visible difference side by side. Imperial Gold is more saturated than Amber Alchemy.

Can I use Imperial Gold instead of Amber Alchemy?

Usually, if you are not matching paint already on the model. Close match (ΔE 9). Imperial Gold is more saturated than Amber Alchemy.

Can I use Amber Alchemy instead of Imperial Gold?

The same difference applies the other way round: Amber Alchemy 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.