Slime Green vs Gauss Green

How close are they?

ΔE 8.6, close: similar, with a visible difference side by side. Gauss Green is a little darker than Slime Green.

Can I use Gauss Green instead of Slime Green?

Usually, if you are not matching paint already on the model. Close match (ΔE 9). Gauss Green is a little darker than Slime Green.

Can I use Slime Green instead of Gauss Green?

The same difference applies the other way round: Slime Green is a little lighter.

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.