Zamesi Desert vs Mustard Yellow

How close are they?

ΔE 9.4, close: similar, with a visible difference side by side. Mustard Yellow is cooler than Zamesi Desert.

Can I use Mustard Yellow instead of Zamesi Desert?

Usually, if you are not matching paint already on the model. Close match (ΔE 9). Mustard Yellow is cooler than Zamesi Desert.

Can I use Zamesi Desert instead of Mustard Yellow?

The same difference applies the other way round: Zamesi Desert is 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.