Fulgurite Copper vs Fire Opal

How close are they?

ΔE 9.0, close: similar, with a visible difference side by side. Fire Opal is a little lighter, more muted than Fulgurite Copper.

Can I use Fire Opal instead of Fulgurite Copper?

Usually, if you are not matching paint already on the model. Close match (ΔE 9). Fire Opal is a little lighter, more muted than Fulgurite Copper.

Can I use Fulgurite Copper instead of Fire Opal?

The same difference applies the other way round: Fulgurite Copper is a little darker, more saturated.

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.