ΔE 11.2, fair: the same colour family, but not a straight swap. Dusken Green is a little lighter, warmer than Leviathan.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Dusken Green is a little lighter, warmer than Leviathan.
The same difference applies the other way round: Leviathan 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 Leviathan on the colour wheel See Dusken Green on the colour wheel
All matches: Leviathan equivalents · Dusken Green equivalents