ΔE 9.6, close: similar, with a visible difference side by side. Turquoise is a little darker, warmer than Night Blue.
Usually, if you are not matching paint already on the model. Close match (ΔE 10). Turquoise is a little darker, warmer than Night Blue.
The same difference applies the other way round: Night Blue is a little lighter, 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.
See Night Blue on the colour wheel See Turquoise on the colour wheel
All matches: Night Blue equivalents · Turquoise equivalents