Screaming Bell vs Iridescent Copper (Coarse)

How close are they?

ΔE 13.1, fair: the same colour family, but not a straight swap. Iridescent Copper (Coarse) is cooler than Screaming Bell. They are different kinds of paint: Citadel Screaming Bell is a metallic and Golden Iridescent Copper (Coarse) is a pearl paint, so they won’t behave the same on the model even where the colour is close.

Can I use Iridescent Copper (Coarse) instead of Screaming Bell?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Iridescent Copper (Coarse) is cooler than Screaming Bell. They are different kinds of paint.

Can I use Screaming Bell instead of Iridescent Copper (Coarse)?

The same difference applies the other way round: Screaming Bell is 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.