ΔE 11.5, fair: the same colour family, but not a straight swap. Matt Black is a little darker, more muted than Chipping.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Matt Black is a little darker, more muted than Chipping.
The same difference applies the other way round: Chipping 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 Chipping on the colour wheel See Matt Black on the colour wheel
All matches: Chipping equivalents · Matt Black equivalents