ΔE 10.6, fair: the same colour family, but not a straight swap. BC Dark Brown is a little lighter, warmer than Dark Highlights.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). BC Dark Brown is a little lighter, warmer than Dark Highlights.
The same difference applies the other way round: Dark Highlights is a little darker, cooler.
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 Dark Highlights on the colour wheel See BC Dark Brown on the colour wheel
All matches: Dark Highlights equivalents · BC Dark Brown equivalents