IJN D2 Green Black vs Dark Reaper

How close are they?

ΔE 11.9, fair: the same colour family, but not a straight swap. Dark Reaper is a little lighter, cooler than IJN D2 Green Black.

Can I use Dark Reaper instead of IJN D2 Green Black?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Dark Reaper is a little lighter, cooler than IJN D2 Green Black.

Can I use IJN D2 Green Black instead of Dark Reaper?

The same difference applies the other way round: IJN D2 Green Black is a little 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.