ΔE 9.4, close: similar, with a visible difference side by side. Zombie Rot is a little lighter, more saturated, cooler than Krieg Khaki.
Usually, if you are not matching paint already on the model. Close match (ΔE 9). Zombie Rot is a little lighter, more saturated, cooler than Krieg Khaki.
The same difference applies the other way round: Krieg Khaki is a little darker, more muted, 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 Krieg Khaki on the colour wheel See Zombie Rot on the colour wheel
All matches: Krieg Khaki equivalents · Zombie Rot equivalents