Ordic Olive vs Traitor Green

How close are they?

ΔE 17.6, loose: different enough that you should pick on purpose. Traitor Green is a little lighter, much more muted than Ordic Olive.

Can I use Traitor Green instead of Ordic Olive?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 18). Traitor Green is a little lighter, much more muted than Ordic Olive.

Can I use Ordic Olive instead of Traitor Green?

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