Moot Green vs Elven Green

How close are they?

ΔE 19.3, loose: different enough that you should pick on purpose. Elven Green is a little darker, much more muted than Moot Green.

Can I use Elven Green instead of Moot Green?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 19). Elven Green is a little darker, much more muted than Moot Green.

Can I use Moot Green instead of Elven Green?

The same difference applies the other way round: Moot Green is a little lighter, much 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.