Dark Mustard Khaki vs Poison Green

How close are they?

ΔE 7.7, close: similar, with a visible difference side by side. Poison Green is a little darker, more saturated, cooler than Dark Mustard Khaki.

Can I use Poison Green instead of Dark Mustard Khaki?

Usually, if you are not matching paint already on the model. Close match (ΔE 8). Poison Green is a little darker, more saturated, cooler than Dark Mustard Khaki.

Can I use Dark Mustard Khaki instead of Poison Green?

The same difference applies the other way round: Dark Mustard Khaki is a little lighter, 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.