Night Blue vs Thunderhawk Blue

How close are they?

ΔE 6.5, close: similar, with a visible difference side by side. Thunderhawk Blue is a little darker, warmer than Night Blue.

Can I use Thunderhawk Blue instead of Night Blue?

Usually, if you are not matching paint already on the model. Close match (ΔE 7). Thunderhawk Blue is a little darker, warmer than Night Blue.

Can I use Night Blue instead of Thunderhawk Blue?

The same difference applies the other way round: Night Blue is a little lighter, 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.