Grimoire Purple vs Dread Red

How close are they?

ΔE 9.9, close: similar, with a visible difference side by side. Dread Red is a little lighter, warmer than Grimoire Purple.

Can I use Dread Red instead of Grimoire Purple?

Usually, if you are not matching paint already on the model. Close match (ΔE 10). Dread Red is a little lighter, warmer than Grimoire Purple.

Can I use Grimoire Purple instead of Dread Red?

The same difference applies the other way round: Grimoire Purple is a little darker, cooler.

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.