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