Night Sky vs Necro Grey

How close are they?

ΔE 10.6, fair: the same colour family, but not a straight swap. Necro Grey is a little darker, more muted than Night Sky.

Can I use Necro Grey instead of Night Sky?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Necro Grey is a little darker, more muted than Night Sky.

Can I use Night Sky instead of Necro Grey?

The same difference applies the other way round: Night Sky is a little lighter, 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.