Leafy Green vs Ordic Olive

How close are they?

ΔE 36.4, loose: different enough that you should pick on purpose. Ordic Olive is noticeably darker, much more muted than Leafy Green.

Can I use Ordic Olive instead of Leafy Green?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 36). Ordic Olive is noticeably darker, much more muted than Leafy Green.

Can I use Leafy Green instead of Ordic Olive?

The same difference applies the other way round: Leafy Green is noticeably 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.