Grey Green vs Light DAK Green

How close are they?

ΔE 8.1, close: similar, with a visible difference side by side. Light DAK Green is a little darker, cooler than Grey Green.

Can I use Light DAK Green instead of Grey Green?

Usually, if you are not matching paint already on the model. Close match (ΔE 8). Light DAK Green is a little darker, cooler than Grey Green.

Can I use Grey Green instead of Light DAK Green?

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

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.