Militia Green vs Tenebrous Teal

How close are they?

ΔE 16.7, loose: different enough that you should pick on purpose. Tenebrous Teal is a little darker, more muted than Militia Green.

Can I use Tenebrous Teal instead of Militia Green?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 17). Tenebrous Teal is a little darker, more muted than Militia Green.

Can I use Militia Green instead of Tenebrous Teal?

The same difference applies the other way round: Militia Green is a little lighter, 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.