Medium Olive Green vs IJA Light Grey Green

How close are they?

ΔE 9.7, close: similar, with a visible difference side by side. IJA Light Grey Green is a little lighter, more muted than Medium Olive Green.

Can I use IJA Light Grey Green instead of Medium Olive Green?

Usually, if you are not matching paint already on the model. Close match (ΔE 10). IJA Light Grey Green is a little lighter, more muted than Medium Olive Green.

Can I use Medium Olive Green instead of IJA Light Grey Green?

The same difference applies the other way round: Medium Olive Green is a little darker, 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.