Coral Red vs Red RLM23

How close are they?

ΔE 10.0, close: similar, with a visible difference side by side. Red RLM23 is a little darker, more muted than Coral Red.

Can I use Red RLM23 instead of Coral Red?

Usually, if you are not matching paint already on the model. Close match (ΔE 10). Red RLM23 is a little darker, more muted than Coral Red.

Can I use Coral Red instead of Red RLM23?

The same difference applies the other way round: Coral Red is a little lighter, 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.