ΔE 12.2, fair: the same colour family, but not a straight swap. Dark Green is a little darker, more muted, cooler than Green Base.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Dark Green is a little darker, more muted, cooler than Green Base.
The same difference applies the other way round: Green Base is a little lighter, more saturated, 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 Green Base on the colour wheel See Dark Green on the colour wheel
All matches: Green Base equivalents · Dark Green equivalents