Bogrin Brown vs US Earth Yellow

How close are they?

ΔE 20.4, loose: different enough that you should pick on purpose. US Earth Yellow is noticeably lighter, more muted, cooler than Bogrin Brown.

Can I use US Earth Yellow instead of Bogrin Brown?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 20). US Earth Yellow is noticeably lighter, more muted, cooler than Bogrin Brown.

Can I use Bogrin Brown instead of US Earth Yellow?

The same difference applies the other way round: Bogrin Brown is noticeably darker, more saturated, 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.