Deep Red vs Black Red

How close are they?

ΔE 8.7, close: similar, with a visible difference side by side. Black Red is more muted, warmer than Deep Red.

Can I use Black Red instead of Deep Red?

Usually, if you are not matching paint already on the model. Close match (ΔE 9). Black Red is more muted, warmer than Deep Red.

Can I use Deep Red instead of Black Red?

The same difference applies the other way round: Deep Red is more saturated, 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.