IJN/IJA Aotake vs Deep Azure

How close are they?

ΔE 7.7, close: similar, with a visible difference side by side. Deep Azure is a little lighter, warmer than IJN/IJA Aotake.

Can I use Deep Azure instead of IJN/IJA Aotake?

Usually, if you are not matching paint already on the model. Close match (ΔE 8). Deep Azure is a little lighter, warmer than IJN/IJA Aotake.

Can I use IJN/IJA Aotake instead of Deep Azure?

The same difference applies the other way round: IJN/IJA Aotake is a little darker, 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.