Storm Blue vs Nocturne Green

How close are they?

ΔE 11.2, fair: the same colour family, but not a straight swap. Nocturne Green is a little darker, more muted, cooler than Storm Blue.

Can I use Nocturne Green instead of Storm Blue?

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

Can I use Storm Blue instead of Nocturne Green?

The same difference applies the other way round: Storm Blue is a little lighter, more saturated, warmer.

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.