ΔE 6.5, close: similar, with a visible difference side by side. Desert Yellow is warmer than Washable Dust.
Usually, if you are not matching paint already on the model. Close match (ΔE 6). Desert Yellow is warmer than Washable Dust.
The same difference applies the other way round: Washable Dust 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.
See Washable Dust on the colour wheel See Desert Yellow on the colour wheel
All matches: Washable Dust equivalents · Desert Yellow equivalents