Dorn Yellow vs Blazing Yellow

How close are they?

ΔE 6.7, close: similar, with a visible difference side by side. Blazing Yellow is a little lighter, more muted than Dorn Yellow.

Can I use Blazing Yellow instead of Dorn Yellow?

Usually, if you are not matching paint already on the model. Close match (ΔE 7). Blazing Yellow is a little lighter, more muted than Dorn Yellow.

Can I use Dorn Yellow instead of Blazing Yellow?

The same difference applies the other way round: Dorn Yellow is a little darker, more saturated.

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.