ΔE 17.1, loose: different enough that you should pick on purpose. Oxford Blue is much more saturated, warmer than Oxidation Green.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 17). Oxford Blue is much more saturated, warmer than Oxidation Green.
The same difference applies the other way round: Oxidation Green is much more muted, 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 Oxidation Green on the colour wheel See Oxford Blue on the colour wheel
All matches: Oxidation Green equivalents · Oxford Blue equivalents