Archangel Red vs Naphthol Red Light

How close are they?

ΔE 7.1, close: similar, with a visible difference side by side. Naphthol Red Light is more saturated than Archangel Red.

Can I use Naphthol Red Light instead of Archangel Red?

Usually, if you are not matching paint already on the model. Close match (ΔE 7). Naphthol Red Light is more saturated than Archangel Red.

Can I use Archangel Red instead of Naphthol Red Light?

The same difference applies the other way round: Archangel Red is more muted.

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.