ΔE 14.5, fair: the same colour family, but not a straight swap. Ancient Copper is a little darker, much more saturated than Hashut Copper.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 15). Ancient Copper is a little darker, much more saturated than Hashut Copper.
The same difference applies the other way round: Hashut Copper is a little lighter, much 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 Hashut Copper on the colour wheel See Ancient Copper on the colour wheel
All matches: Hashut Copper equivalents · Ancient Copper equivalents