ΔE 12.6, fair: the same colour family, but not a straight swap. Chancellor Blue is noticeably lighter, more saturated than Corvus Black.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Chancellor Blue is noticeably lighter, more saturated than Corvus Black.
The same difference applies the other way round: Corvus Black is noticeably darker, 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 Corvus Black on the colour wheel See Chancellor Blue on the colour wheel
All matches: Corvus Black equivalents · Chancellor Blue equivalents