ΔE 11.8, fair: the same colour family, but not a straight swap. Fern Green is a little lighter, more muted, warmer than Dark Green Mitsubishi.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Fern Green is a little lighter, more muted, warmer than Dark Green Mitsubishi.
The same difference applies the other way round: Dark Green Mitsubishi is a little darker, more saturated, 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 Dark Green Mitsubishi on the colour wheel See Fern Green on the colour wheel
All matches: Dark Green Mitsubishi equivalents · Fern Green equivalents