ΔE 12.1, fair: the same colour family, but not a straight swap. Greenskin is noticeably lighter, cooler than Dark Marine Green.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Greenskin is noticeably lighter, cooler than Dark Marine Green.
The same difference applies the other way round: Dark Marine Green is noticeably darker, 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 Dark Marine Green on the colour wheel See Greenskin on the colour wheel
All matches: Dark Marine Green equivalents · Greenskin equivalents