Emerald Forest vs Canary Green

How close are they?

ΔE 31.5, loose: different enough that you should pick on purpose. Canary Green is noticeably lighter, more muted, warmer than Emerald Forest.

Can I use Canary Green instead of Emerald Forest?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 31). Canary Green is noticeably lighter, more muted, warmer than Emerald Forest.

Can I use Emerald Forest instead of Canary Green?

The same difference applies the other way round: Emerald Forest is noticeably darker, more saturated, 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.