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