Blackert Brown vs US Earth Yellow

How close are they?

ΔE 7.1, close: similar, with a visible difference side by side. US Earth Yellow is cooler than Blackert Brown.

Can I use US Earth Yellow instead of Blackert Brown?

Usually, if you are not matching paint already on the model. Close match (ΔE 7). US Earth Yellow is cooler than Blackert Brown.

Can I use Blackert Brown instead of US Earth Yellow?

The same difference applies the other way round: Blackert Brown 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.