Desert Khaki vs Ivory RLM05

How close are they?

ΔE 6.9, close: similar, with a visible difference side by side. Ivory RLM05 is a little lighter, cooler than Desert Khaki.

Can I use Ivory RLM05 instead of Desert Khaki?

Usually, if you are not matching paint already on the model. Close match (ΔE 7). Ivory RLM05 is a little lighter, cooler than Desert Khaki.

Can I use Desert Khaki instead of Ivory RLM05?

The same difference applies the other way round: Desert Khaki 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.