Hull Red vs Brown RLM26

How close are they?

ΔE 8.3, close: similar, with a visible difference side by side. Brown RLM26 is a little lighter, more saturated, warmer than Hull Red.

Can I use Brown RLM26 instead of Hull Red?

Usually, if you are not matching paint already on the model. Close match (ΔE 8). Brown RLM26 is a little lighter, more saturated, warmer than Hull Red.

Can I use Hull Red instead of Brown RLM26?

The same difference applies the other way round: Hull Red is a little darker, more muted, 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.