Nº6 Earth Yellow (FS30257) vs Bullwhack Brown

How close are they?

ΔE 8.2, close: similar, with a visible difference side by side. Bullwhack Brown is warmer than Nº6 Earth Yellow (FS30257).

Can I use Bullwhack Brown instead of Nº6 Earth Yellow (FS30257)?

Usually, if you are not matching paint already on the model. Close match (ΔE 8). Bullwhack Brown is warmer than Nº6 Earth Yellow (FS30257).

Can I use Nº6 Earth Yellow (FS30257) instead of Bullwhack Brown?

The same difference applies the other way round: Nº6 Earth Yellow (FS30257) 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.