Fern Green vs Caliban Green

How close are they?

ΔE 14.2, fair: the same colour family, but not a straight swap. Caliban Green is a little darker, more muted than Fern Green.

Can I use Caliban Green instead of Fern Green?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Caliban Green is a little darker, more muted than Fern Green.

Can I use Fern Green instead of Caliban Green?

The same difference applies the other way round: Fern 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.