ΔE 12.9, fair: the same colour family, but not a straight swap. Green Sky is a little lighter, warmer than Green FS34227.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Green Sky is a little lighter, warmer than Green FS34227.
The same difference applies the other way round: Green FS34227 is a little darker, 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 Green FS34227 on the colour wheel See Green Sky on the colour wheel
All matches: Green FS34227 equivalents · Green Sky equivalents