ΔE 11.5, fair: the same colour family, but not a straight swap. Chrome Oxide Green is a little lighter, more saturated, warmer than Guardian Green.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Chrome Oxide Green is a little lighter, more saturated, warmer than Guardian Green.
The same difference applies the other way round: Guardian Green is a little darker, 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 Guardian Green on the colour wheel See Chrome Oxide Green on the colour wheel
All matches: Guardian Green equivalents · Chrome Oxide Green equivalents