Raptor Shuttle Turquoise vs Nocturne Green

How close are they?

ΔE 8.7, close: similar, with a visible difference side by side. Nocturne Green is a little lighter, cooler than Raptor Shuttle Turquoise.

Can I use Nocturne Green instead of Raptor Shuttle Turquoise?

Usually, if you are not matching paint already on the model. Close match (ΔE 9). Nocturne Green is a little lighter, cooler than Raptor Shuttle Turquoise.

Can I use Raptor Shuttle Turquoise instead of Nocturne Green?

The same difference applies the other way round: Raptor Shuttle Turquoise is a little darker, 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.