JASDF Shallow Ocean Blue vs UK Azure Blue

How close are they?

ΔE 6.6, close: similar, with a visible difference side by side. UK Azure Blue is a little lighter than JASDF Shallow Ocean Blue.

Can I use UK Azure Blue instead of JASDF Shallow Ocean Blue?

Usually, if you are not matching paint already on the model. Close match (ΔE 7). UK Azure Blue is a little lighter than JASDF Shallow Ocean Blue.

Can I use JASDF Shallow Ocean Blue instead of UK Azure Blue?

The same difference applies the other way round: JASDF Shallow Ocean 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.