Wild Green vs Irati Green

How close are they?

ΔE 18.9, loose: different enough that you should pick on purpose. Irati Green is noticeably darker, more muted, cooler than Wild Green.

Can I use Irati Green instead of Wild Green?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 19). Irati Green is noticeably darker, more muted, cooler than Wild Green.

Can I use Wild Green instead of Irati Green?

The same difference applies the other way round: Wild Green is noticeably lighter, more saturated, warmer.

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.