Deep Red vs Hull Red

How close are they?

ΔE 9.8, close: similar, with a visible difference side by side. Hull Red is a little lighter, more muted, warmer than Deep Red.

Can I use Hull Red instead of Deep Red?

Usually, if you are not matching paint already on the model. Close match (ΔE 10). Hull Red is a little lighter, more muted, warmer than Deep Red.

Can I use Deep Red instead of Hull Red?

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