ΔE 14.0, fair: the same colour family, but not a straight swap. Dark Red is noticeably lighter, cooler than Choco Brown.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Dark Red is noticeably lighter, cooler than Choco Brown.
The same difference applies the other way round: Choco Brown is noticeably darker, warmer.
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 Choco Brown on the colour wheel See Dark Red on the colour wheel
All matches: Choco Brown equivalents · Dark Red equivalents