Rifle Brown vs Black Red

How close are they?

ΔE 9.2, close: similar, with a visible difference side by side. Black Red is a little darker, cooler than Rifle Brown.

Can I use Black Red instead of Rifle Brown?

Usually, if you are not matching paint already on the model. Close match (ΔE 9). Black Red is a little darker, cooler than Rifle Brown.

Can I use Rifle Brown instead of Black Red?

The same difference applies the other way round: Rifle Brown is a little lighter, 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.