ΔE 5.3, very close: most people won’t see a difference side by side. Black Grey RLM66 is a little lighter, more muted than Midnight Blue.
Yes, for most jobs. Very close match (ΔE 5). Black Grey RLM66 is a little lighter, more muted than Midnight Blue.
The same difference applies the other way round: Midnight Blue is a little darker, 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.
See Midnight Blue on the colour wheel See Black Grey RLM66 on the colour wheel
All matches: Midnight Blue equivalents · Black Grey RLM66 equivalents