ΔE 16.1, loose: different enough that you should pick on purpose. Park Green Flat is more muted, cooler than Chrome Oxide Green.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 16). Park Green Flat is more muted, cooler than Chrome Oxide Green.
The same difference applies the other way round: Chrome Oxide Green is more saturated, 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 Chrome Oxide Green on the colour wheel See Park Green Flat on the colour wheel
All matches: Chrome Oxide Green equivalents · Park Green Flat equivalents