Tanker Grey vs IJN Gray (Maizuru Arsenal)

How close are they?

ΔE 9.7, close: similar, with a visible difference side by side. IJN Gray (Maizuru Arsenal) is a little darker, more muted than Tanker Grey.

Can I use IJN Gray (Maizuru Arsenal) instead of Tanker Grey?

Usually, if you are not matching paint already on the model. Close match (ΔE 10). IJN Gray (Maizuru Arsenal) is a little darker, more muted than Tanker Grey.

Can I use Tanker Grey instead of IJN Gray (Maizuru Arsenal)?

The same difference applies the other way round: Tanker Grey is a little lighter, 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.