Dark Reaper vs Dark Green Kawanishi

How close are they?

ΔE 10.0, close: similar, with a visible difference side by side. Dark Green Kawanishi is warmer than Dark Reaper.

Can I use Dark Green Kawanishi instead of Dark Reaper?

Usually, if you are not matching paint already on the model. Close match (ΔE 10). Dark Green Kawanishi is warmer than Dark Reaper.

Can I use Dark Reaper instead of Dark Green Kawanishi?

The same difference applies the other way round: Dark Reaper is 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.