Pale Grey (RLM 76) vs Mossy Green

How close are they?

ΔE 9.7, close: similar, with a visible difference side by side. Mossy Green is a little lighter, more saturated, warmer than Pale Grey (RLM 76).

Can I use Mossy Green instead of Pale Grey (RLM 76)?

Usually, if you are not matching paint already on the model. Close match (ΔE 10). Mossy Green is a little lighter, more saturated, warmer than Pale Grey (RLM 76).

Can I use Pale Grey (RLM 76) instead of Mossy Green?

The same difference applies the other way round: Pale Grey (RLM 76) is a little darker, 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.