RAL 8031 F9 Sandbraun vs Desert Yellow

How close are they?

ΔE 9.6, close: similar, with a visible difference side by side. Desert Yellow is a little lighter, more saturated, cooler than RAL 8031 F9 Sandbraun.

Can I use Desert Yellow instead of RAL 8031 F9 Sandbraun?

Usually, if you are not matching paint already on the model. Close match (ΔE 10). Desert Yellow is a little lighter, more saturated, cooler than RAL 8031 F9 Sandbraun.

Can I use RAL 8031 F9 Sandbraun instead of Desert Yellow?

The same difference applies the other way round: RAL 8031 F9 Sandbraun 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.