Nocturne Green vs Hydra Green

How close are they?

ΔE 10.7, fair: the same colour family, but not a straight swap. Hydra Green is more muted, warmer than Nocturne Green.

Can I use Hydra Green instead of Nocturne Green?

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

Can I use Nocturne Green instead of Hydra Green?

The same difference applies the other way round: Nocturne Green is more saturated, cooler.

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.