ΔE 11.3, fair: the same colour family, but not a straight swap. Black Green RLM70 is a little darker, more muted than Terror Blue-Grey.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Black Green RLM70 is a little darker, more muted than Terror Blue-Grey.
The same difference applies the other way round: Terror Blue-Grey 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.
See Terror Blue-Grey on the colour wheel See Black Green RLM70 on the colour wheel
All matches: Terror Blue-Grey equivalents · Black Green RLM70 equivalents