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