ΔE 12.8, fair: the same colour family, but not a straight swap. Dark Green Mitsubishi is noticeably darker, warmer than Guardian Green.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Dark Green Mitsubishi is noticeably darker, warmer than Guardian Green.
The same difference applies the other way round: Guardian Green is noticeably lighter, 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 Dark Green Mitsubishi on the colour wheel
All matches: Guardian Green equivalents · Dark Green Mitsubishi equivalents