Olive Green vs Leafy Green

How close are they?

ΔE 17.2, loose: different enough that you should pick on purpose. Leafy Green is a little lighter, more saturated, cooler than Olive Green.

Can I use Leafy Green instead of Olive Green?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 17). Leafy Green is a little lighter, more saturated, cooler than Olive Green.

Can I use Olive Green instead of Leafy Green?

The same difference applies the other way round: Olive Green is a little darker, more muted, 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.