Archaic Turquoise vs Black Green

How close are they?

ΔE 11.1, fair: the same colour family, but not a straight swap. Black Green is more muted than Archaic Turquoise.

Can I use Black Green instead of Archaic Turquoise?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Black Green is more muted than Archaic Turquoise.

Can I use Archaic Turquoise instead of Black Green?

The same difference applies the other way round: Archaic Turquoise is 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.