Riff Green vs Grey Green RLM74

How close are they?

ΔE 8.8, close: similar, with a visible difference side by side. Grey Green RLM74 is a little lighter, more muted than Riff Green.

Can I use Grey Green RLM74 instead of Riff Green?

Usually, if you are not matching paint already on the model. Close match (ΔE 9). Grey Green RLM74 is a little lighter, more muted than Riff Green.

Can I use Riff Green instead of Grey Green RLM74?

The same difference applies the other way round: Riff 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.