Starship Filth vs Dark Green RLM71

How close are they?

ΔE 6.8, close: similar, with a visible difference side by side. Dark Green RLM71 is a little darker, more saturated, warmer than Starship Filth.

Can I use Dark Green RLM71 instead of Starship Filth?

Usually, if you are not matching paint already on the model. Close match (ΔE 7). Dark Green RLM71 is a little darker, more saturated, warmer than Starship Filth.

Can I use Starship Filth instead of Dark Green RLM71?

The same difference applies the other way round: Starship Filth 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.