Midnight Blue vs Kantor Blue

How close are they?

ΔE 9.5, close: similar, with a visible difference side by side. Kantor Blue is a little lighter than Midnight Blue.

Can I use Kantor Blue instead of Midnight Blue?

Usually, if you are not matching paint already on the model. Close match (ΔE 9). Kantor Blue is a little lighter than Midnight Blue.

Can I use Midnight Blue instead of Kantor Blue?

The same difference applies the other way round: Midnight Blue is a little darker.

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.