Dark Green-Grey vs Pacific Green

How close are they?

ΔE 8.7, close: similar, with a visible difference side by side. Pacific Green is a little darker, more saturated, warmer than Dark Green-Grey.

Can I use Pacific Green instead of Dark Green-Grey?

Usually, if you are not matching paint already on the model. Close match (ΔE 9). Pacific Green is a little darker, more saturated, warmer than Dark Green-Grey.

Can I use Dark Green-Grey instead of Pacific Green?

The same difference applies the other way round: Dark Green-Grey is a little lighter, more muted, 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.